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Zipperpin---2.1.9999.UNS-Ref.s

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%------------------------------------------------------------------------------
% File     : Zipperpin---2.1.9999
% Problem  : LCL123-1 : TPTP v9.3.1. Bugfixed v2.3.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.YUD6RRY0hB true

% Computer : n027.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8046.5625MB
% OS       : Linux 6.8.0-71-generic
% CPULimit : 300s
% WCLimit  : 300s
% DateTime : Mon Sep  7 01:35:15 PM UTC 2026

% Result   : Unsatisfiable 9.86s 2.10s
% Output   : Refutation 9.86s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.03  % Problem  : LCL123-1 : TPTP v9.3.1. Bugfixed v2.3.0.
% 0.00/0.05  % Command  : python3 /export/starexec/sandbox/solver/bin/portfolio.lams.parallel.py %s %d /export/starexec/sandbox/tmp/tmp.YUD6RRY0hB true
% 0.11/0.37  % Computer : n027.cluster.edu
% 0.11/0.37  % Model    : x86_64 x86_64
% 0.11/0.37  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.11/0.37  % Memory   : 8046.5625MB
% 0.11/0.37  % OS       : Linux 6.8.0-71-generic
% 0.11/0.37  % CPULimit : 300
% 0.11/0.37  % WCLimit  : 300
% 0.11/0.37  % DateTime : Fri Sep  4 22:31:28 UTC 2026
% 0.11/0.37  % CPUTime  : 
% 0.11/0.37  % Running portfolio for 300 s
% 0.11/0.37  % File         : /export/starexec/sandbox/benchmark/theBenchmark.p
% 0.11/0.37  % Number of cores: 8
% 0.11/0.38  % Python version: Python 3.12.3
% 0.11/0.38  % Running in FO mode
% 0.42/0.66  % Total configuration time : 435
% 0.42/0.66  % Estimated wc time : 1092
% 0.42/0.66  % Estimated cpu time (7 cpus) : 156.0
% 0.46/0.74  % /export/starexec/sandbox/solver/bin/fo/fo6_bce.sh running for 75s
% 0.46/0.80  % /export/starexec/sandbox/solver/bin/fo/fo1_av.sh running for 75s
% 0.46/0.80  % /export/starexec/sandbox/solver/bin/fo/fo3_bce.sh running for 75s
% 0.46/0.80  % /export/starexec/sandbox/solver/bin/fo/fo7.sh running for 63s
% 0.46/0.81  % /export/starexec/sandbox/solver/bin/fo/fo13.sh running for 50s
% 0.46/0.81  % /export/starexec/sandbox/solver/bin/fo/fo4.sh running for 50s
% 0.46/0.81  % /export/starexec/sandbox/solver/bin/fo/fo5.sh running for 50s
% 9.86/2.10  % Solved by fo/fo13.sh.
% 9.86/2.10  % done 357 iterations in 1.264s
% 9.86/2.10  % SZS status Theorem for '/export/starexec/sandbox/benchmark/theBenchmark.p'
% 9.86/2.10  % SZS output start Refutation
% 9.86/2.10  thf(c_type, type, c: $i).
% 9.86/2.10  thf(is_a_theorem_type, type, is_a_theorem: $i > $o).
% 9.86/2.10  thf(equivalent_type, type, equivalent: $i > $i > $i).
% 9.86/2.10  thf(f_type, type, f: $i).
% 9.86/2.10  thf(b_type, type, b: $i).
% 9.86/2.10  thf(e_type, type, e: $i).
% 9.86/2.10  thf(a_type, type, a: $i).
% 9.86/2.10  thf(lg_2, axiom,
% 9.86/2.10    (is_a_theorem @
% 9.86/2.10     ( equivalent @
% 9.86/2.10       X @ 
% 9.86/2.10       ( equivalent @
% 9.86/2.10         X @ 
% 9.86/2.10         ( equivalent @
% 9.86/2.10           ( equivalent @ Y @ Z ) @ 
% 9.86/2.10           ( equivalent @ ( equivalent @ Y @ U ) @ ( equivalent @ Z @ U ) ) ) ) ))).
% 9.86/2.10  thf(zip_derived_cl1, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ X0 @ 
% 9.86/2.10            (equivalent @ X0 @ 
% 9.86/2.10             (equivalent @ (equivalent @ X1 @ X2) @ 
% 9.86/2.10              (equivalent @ (equivalent @ X1 @ X3) @ (equivalent @ X2 @ X3))))))),
% 9.86/2.10      inference('cnf', [status(esa)], [lg_2])).
% 9.86/2.10  thf(condensed_detachment, axiom,
% 9.86/2.10    (( ~( is_a_theorem @ ( equivalent @ X @ Y ) ) ) | 
% 9.86/2.10     ( ~( is_a_theorem @ X ) ) | ( is_a_theorem @ Y ))).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl4, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ X3)
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ X3 @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10                (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl5, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ X3)
% 9.86/2.10          | ~ (is_a_theorem @ X3)
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl4, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl6, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10             (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))
% 9.86/2.10          | ~ (is_a_theorem @ X3))),
% 9.86/2.10      inference('simplify', [status(thm)], [zip_derived_cl5])).
% 9.86/2.10  thf(zip_derived_cl1, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ X0 @ 
% 9.86/2.10            (equivalent @ X0 @ 
% 9.86/2.10             (equivalent @ (equivalent @ X1 @ X2) @ 
% 9.86/2.10              (equivalent @ (equivalent @ X1 @ X3) @ (equivalent @ X2 @ X3))))))),
% 9.86/2.10      inference('cnf', [status(esa)], [lg_2])).
% 9.86/2.10  thf(zip_derived_cl10, plain,
% 9.86/2.10      (![X4 : $i, X5 : $i, X6 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ X6 @ X5) @ 
% 9.86/2.10            (equivalent @ (equivalent @ X6 @ X4) @ (equivalent @ X5 @ X4))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl1])).
% 9.86/2.10  thf(zip_derived_cl6, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10             (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))
% 9.86/2.10          | ~ (is_a_theorem @ X3))),
% 9.86/2.10      inference('simplify', [status(thm)], [zip_derived_cl5])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl8, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ X3)
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl6, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl23, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ (equivalent @ X2 @ X1) @ X3) @ 
% 9.86/2.10            (equivalent @ 
% 9.86/2.10             (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)) @ 
% 9.86/2.10             X3)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl10, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl27, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i, X4 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ 
% 9.86/2.10                (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10                X4) @ 
% 9.86/2.10               (equivalent @ X0 @ X4))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl26, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)))
% 9.86/2.10          |  (is_a_theorem @ X0))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl73, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X0 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X1 @ X0) @ (equivalent @ X0 @ X0))))),
% 9.86/2.10      inference('eq_fact', [status(thm)], [zip_derived_cl26])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl104, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X0 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X1 @ X0)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl73, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl169, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X3 : $i, X4 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X4 @ X3) @ X1))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ (equivalent @ X1 @ X0) @ (equivalent @ X1 @ X0))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl27, zip_derived_cl104])).
% 9.86/2.10  thf(zip_derived_cl26, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)))
% 9.86/2.10          |  (is_a_theorem @ X0))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl451, plain,
% 9.86/2.10      (![X1 : $i, X2 : $i, X3 : $i, X4 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ (equivalent @ X1 @ X1) @ X4))
% 9.86/2.10          |  (is_a_theorem @ X4))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl169, zip_derived_cl26])).
% 9.86/2.10  thf(zip_derived_cl524, plain,
% 9.86/2.10      (![X0 : $i]:
% 9.86/2.10         ( (is_a_theorem @ X0)
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ (equivalent @ X0 @ X0) @ X0)))),
% 9.86/2.10      inference('eq_fact', [status(thm)], [zip_derived_cl451])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl539, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X1 @ X1) @ (equivalent @ X1 @ X0))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl524, zip_derived_cl24])).
% 9.86/2.10  thf(zip_derived_cl104, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X0 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X1 @ X0)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl73, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl548, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X0 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X1 @ (equivalent @ X0 @ X0))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl539, zip_derived_cl104])).
% 9.86/2.10  thf(zip_derived_cl10, plain,
% 9.86/2.10      (![X4 : $i, X5 : $i, X6 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ X6 @ X5) @ 
% 9.86/2.10            (equivalent @ (equivalent @ X6 @ X4) @ (equivalent @ X5 @ X4))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl1])).
% 9.86/2.10  thf(zip_derived_cl585, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ X1 @ X0) @ (equivalent @ X1 @ X0)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl548, zip_derived_cl10])).
% 9.86/2.10  thf(zip_derived_cl548, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X0 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X1 @ (equivalent @ X0 @ X0))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl539, zip_derived_cl104])).
% 9.86/2.10  thf(zip_derived_cl631, plain,
% 9.86/2.10      (![X0 : $i]:  (is_a_theorem @ (equivalent @ X0 @ X0))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl585, zip_derived_cl548])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(prove_lg_4, conjecture,
% 9.86/2.10    (is_a_theorem @
% 9.86/2.10     ( equivalent @
% 9.86/2.10       ( equivalent @
% 9.86/2.10         ( equivalent @ a @ ( equivalent @ b @ c ) ) @ 
% 9.86/2.10         ( equivalent @ e @ ( equivalent @ b @ f ) ) ) @ 
% 9.86/2.10       ( equivalent @ a @ ( equivalent @ e @ ( equivalent @ c @ f ) ) ) ))).
% 9.86/2.10  thf(zf_stmt_0, negated_conjecture,
% 9.86/2.10    (~( is_a_theorem @
% 9.86/2.10        ( equivalent @
% 9.86/2.10          ( equivalent @
% 9.86/2.10            ( equivalent @ a @ ( equivalent @ b @ c ) ) @ 
% 9.86/2.10            ( equivalent @ e @ ( equivalent @ b @ f ) ) ) @ 
% 9.86/2.10          ( equivalent @ a @ ( equivalent @ e @ ( equivalent @ c @ f ) ) ) ) )),
% 9.86/2.10    inference('cnf.neg', [status(esa)], [prove_lg_4])).
% 9.86/2.10  thf(zip_derived_cl2, plain,
% 9.86/2.10      (~ (is_a_theorem @ 
% 9.86/2.10          (equivalent @ 
% 9.86/2.10           (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10            (equivalent @ e @ (equivalent @ b @ f))) @ 
% 9.86/2.10           (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f)))))),
% 9.86/2.10      inference('cnf', [status(esa)], [zf_stmt_0])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl3, plain,
% 9.86/2.10      (![X0 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ X0 @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10                (equivalent @ e @ (equivalent @ b @ f))) @ 
% 9.86/2.10               (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))))))
% 9.86/2.10          | ~ (is_a_theorem @ X0))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl2, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl28, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10                (equivalent @ e @ (equivalent @ b @ f))) @ 
% 9.86/2.10               (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl3])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl31, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ (equivalent @ X0 @ X1) @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))) @ X1)))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X0 @ 
% 9.86/2.10                (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10                 (equivalent @ e @ (equivalent @ b @ f))))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl28, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl4, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ X3)
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ X3 @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10                (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl76, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ X1 @ 
% 9.86/2.10              (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10               (equivalent @ e @ (equivalent @ b @ f)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ 
% 9.86/2.10                (equivalent @ (equivalent @ a @ X0) @ 
% 9.86/2.10                 (equivalent @ (equivalent @ e @ (equivalent @ c @ f)) @ X0)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl31, zip_derived_cl4])).
% 9.86/2.10  thf(zip_derived_cl10, plain,
% 9.86/2.10      (![X4 : $i, X5 : $i, X6 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ X6 @ X5) @ 
% 9.86/2.10            (equivalent @ (equivalent @ X6 @ X4) @ (equivalent @ X5 @ X4))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl6, zip_derived_cl1])).
% 9.86/2.10  thf(zip_derived_cl157, plain,
% 9.86/2.10      (~ (is_a_theorem @ 
% 9.86/2.10          (equivalent @ 
% 9.86/2.10           (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))) @ 
% 9.86/2.10           (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10            (equivalent @ e @ (equivalent @ b @ f)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl76, zip_derived_cl10])).
% 9.86/2.10  thf(zip_derived_cl26, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)))
% 9.86/2.10          |  (is_a_theorem @ X0))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl52, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X3) @ (equivalent @ X0 @ X3)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl26, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl343, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ (equivalent @ X1 @ X0) @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10                (equivalent @ e @ (equivalent @ b @ f))) @ 
% 9.86/2.10               X0)))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ 
% 9.86/2.10                (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl157, zip_derived_cl52])).
% 9.86/2.10  thf(zip_derived_cl4, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ X3)
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ X3 @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10                (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl391, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ X1 @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ 
% 9.86/2.10                (equivalent @ 
% 9.86/2.10                 (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ X0) @ 
% 9.86/2.10                 (equivalent @ (equivalent @ e @ (equivalent @ b @ f)) @ X0)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl343, zip_derived_cl4])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl405, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ 
% 9.86/2.10              (equivalent @ X1 @ 
% 9.86/2.10               (equivalent @ (equivalent @ e @ (equivalent @ b @ f)) @ X0)) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ 
% 9.86/2.10                (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ X0))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl391, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl1, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ X0 @ 
% 9.86/2.10            (equivalent @ X0 @ 
% 9.86/2.10             (equivalent @ (equivalent @ X1 @ X2) @ 
% 9.86/2.10              (equivalent @ (equivalent @ X1 @ X3) @ (equivalent @ X2 @ X3))))))),
% 9.86/2.10      inference('cnf', [status(esa)], [lg_2])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl19, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i, X4 : $i]:
% 9.86/2.10          (is_a_theorem @ 
% 9.86/2.10           (equivalent @ (equivalent @ X3 @ X4) @ 
% 9.86/2.10            (equivalent @ 
% 9.86/2.10             (equivalent @ X3 @ 
% 9.86/2.10              (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))) @ 
% 9.86/2.10             X4)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl0, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X0 @ X1))
% 9.86/2.10          | ~ (is_a_theorem @ X0)
% 9.86/2.10          |  (is_a_theorem @ X1))),
% 9.86/2.10      inference('cnf', [status(esa)], [condensed_detachment])).
% 9.86/2.10  thf(zip_derived_cl43, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i, X4 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ X4 @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ X4 @ 
% 9.86/2.10                (equivalent @ (equivalent @ X3 @ X2) @ 
% 9.86/2.10                 (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)))) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl19, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl714, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ X1 @ 
% 9.86/2.10              (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.10               (equivalent @ (equivalent @ e @ X0) @ 
% 9.86/2.10                (equivalent @ (equivalent @ b @ f) @ X0)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ 
% 9.86/2.10                (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl405, zip_derived_cl43])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl797, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ 
% 9.86/2.10              (equivalent @ X1 @ 
% 9.86/2.10               (equivalent @ (equivalent @ e @ X0) @ 
% 9.86/2.10                (equivalent @ (equivalent @ b @ f) @ X0))) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ X1 @ (equivalent @ a @ (equivalent @ b @ c)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl714, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl861, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ 
% 9.86/2.10              (equivalent @ X1 @ (equivalent @ (equivalent @ b @ f) @ X0)) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ b @ c))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X1 @ (equivalent @ e @ X0)) @ 
% 9.86/2.10                (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f))))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl797, zip_derived_cl24])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl866, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ 
% 9.86/2.10              (equivalent @ (equivalent @ X1 @ X0) @ (equivalent @ e @ X0)) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ e @ (equivalent @ c @ f)))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X1 @ (equivalent @ b @ f)) @ 
% 9.86/2.10                (equivalent @ a @ (equivalent @ b @ c)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl861, zip_derived_cl24])).
% 9.86/2.10  thf(zip_derived_cl18, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.10         ( (is_a_theorem @ 
% 9.86/2.10            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.10      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.10  thf(zip_derived_cl873, plain,
% 9.86/2.10      (![X0 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ (equivalent @ X0 @ (equivalent @ b @ f)) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ b @ c))))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X0 @ (equivalent @ c @ f)) @ a)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl866, zip_derived_cl18])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl880, plain,
% 9.86/2.10      (![X0 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ 
% 9.86/2.10              (equivalent @ (equivalent @ X0 @ f) @ (equivalent @ c @ f)) @ a))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X0 @ b) @ 
% 9.86/2.10                (equivalent @ a @ (equivalent @ b @ c)))))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl873, zip_derived_cl24])).
% 9.86/2.10  thf(zip_derived_cl24, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.10          |  (is_a_theorem @ 
% 9.86/2.10              (equivalent @ 
% 9.86/2.10               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.10               X0)))),
% 9.86/2.10      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.10  thf(zip_derived_cl938, plain,
% 9.86/2.10      (![X0 : $i]:
% 9.86/2.10         (~ (is_a_theorem @ 
% 9.86/2.10             (equivalent @ (equivalent @ X0 @ b) @ 
% 9.86/2.10              (equivalent @ a @ (equivalent @ b @ c))))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ (equivalent @ X0 @ c) @ a)))),
% 9.86/2.10      inference('s_sup+', [status(thm)], [zip_derived_cl880, zip_derived_cl24])).
% 9.86/2.10  thf(zip_derived_cl52, plain,
% 9.86/2.10      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.10         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.10          | ~ (is_a_theorem @ 
% 9.86/2.10               (equivalent @ (equivalent @ X2 @ X3) @ (equivalent @ X0 @ X3)))
% 9.86/2.10          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl26, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl942, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X0 @ c) @ a))
% 9.86/2.11          | ~ (is_a_theorem @ 
% 9.86/2.11               (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.11                (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ X1)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X2 @ (equivalent @ X0 @ b))))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl938, zip_derived_cl52])).
% 9.86/2.11  thf(zip_derived_cl631, plain,
% 9.86/2.11      (![X0 : $i]:  (is_a_theorem @ (equivalent @ X0 @ X0))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl585, zip_derived_cl548])).
% 9.86/2.11  thf(zip_derived_cl1027, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ 
% 9.86/2.11             (equivalent @ (equivalent @ (equivalent @ X0 @ b) @ X1) @ 
% 9.86/2.11              (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ X1)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ (equivalent @ X0 @ c) @ a)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl942, zip_derived_cl631])).
% 9.86/2.11  thf(zip_derived_cl631, plain,
% 9.86/2.11      (![X0 : $i]:  (is_a_theorem @ (equivalent @ X0 @ X0))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl585, zip_derived_cl548])).
% 9.86/2.11  thf(zip_derived_cl26, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ 
% 9.86/2.11               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)))
% 9.86/2.11          |  (is_a_theorem @ X0))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl24, zip_derived_cl0])).
% 9.86/2.11  thf(zip_derived_cl679, plain,
% 9.86/2.11      (![X1 : $i, X2 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X1 @ X1) @ X2))
% 9.86/2.11          |  (is_a_theorem @ X2))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl631, zip_derived_cl26])).
% 9.86/2.11  thf(zip_derived_cl18, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.11         ( (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.11      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.11  thf(zip_derived_cl751, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X0 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl679, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl1350, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X1 @ c) @ a))
% 9.86/2.11          | ~ (is_a_theorem @ 
% 9.86/2.11               (equivalent @ 
% 9.86/2.11                (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ X0) @ 
% 9.86/2.11                (equivalent @ (equivalent @ X1 @ b) @ X0))))),
% 9.86/2.11      inference('s_sup+', [status(thm)],
% 9.86/2.11                [zip_derived_cl1027, zip_derived_cl751])).
% 9.86/2.11  thf(zip_derived_cl4, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ X3)
% 9.86/2.11          |  (is_a_theorem @ 
% 9.86/2.11              (equivalent @ X3 @ 
% 9.86/2.11               (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.11                (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0))))))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl1, zip_derived_cl0])).
% 9.86/2.11  thf(zip_derived_cl1755, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X1 @ c) @ a))
% 9.86/2.11          | ~ (is_a_theorem @ 
% 9.86/2.11               (equivalent @ (equivalent @ a @ (equivalent @ b @ c)) @ 
% 9.86/2.11                (equivalent @ (equivalent @ X1 @ X0) @ (equivalent @ b @ X0)))))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl1350, zip_derived_cl4])).
% 9.86/2.11  thf(zip_derived_cl18, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.11         ( (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ X2 @ X0) @ (equivalent @ X1 @ X0)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.11      inference('condensation', [status(thm)], [zip_derived_cl8])).
% 9.86/2.11  thf(zip_derived_cl1922, plain,
% 9.86/2.11      (![X0 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X0 @ c) @ a))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ a @ (equivalent @ X0 @ c))))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl1755, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl751, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X0 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl679, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl1925, plain,
% 9.86/2.11      (![X0 : $i]: ~ (is_a_theorem @ (equivalent @ a @ (equivalent @ X0 @ c)))),
% 9.86/2.11      inference('clc', [status(thm)], [zip_derived_cl1922, zip_derived_cl751])).
% 9.86/2.11  thf(zip_derived_cl52, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.11         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ 
% 9.86/2.11               (equivalent @ (equivalent @ X2 @ X3) @ (equivalent @ X0 @ X3)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X2 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl26, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl1929, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ 
% 9.86/2.11             (equivalent @ (equivalent @ X2 @ X1) @ 
% 9.86/2.11              (equivalent @ (equivalent @ X0 @ c) @ X1)))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X2 @ a)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl1925, zip_derived_cl52])).
% 9.86/2.11  thf(zip_derived_cl1950, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ~ (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ a @ X0) @ 
% 9.86/2.11             (equivalent @ (equivalent @ X1 @ c) @ X0)))),
% 9.86/2.11      inference('s_sup-', [status(thm)],
% 9.86/2.11                [zip_derived_cl631, zip_derived_cl1929])).
% 9.86/2.11  thf(zip_derived_cl751, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X0 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl679, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl1958, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ~ (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ (equivalent @ X1 @ c) @ X0) @ 
% 9.86/2.11             (equivalent @ a @ X0)))),
% 9.86/2.11      inference('s_sup+', [status(thm)],
% 9.86/2.11                [zip_derived_cl1950, zip_derived_cl751])).
% 9.86/2.11  thf(zip_derived_cl24, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.11         (~ (is_a_theorem @ (equivalent @ (equivalent @ X3 @ X2) @ X0))
% 9.86/2.11          |  (is_a_theorem @ 
% 9.86/2.11              (equivalent @ 
% 9.86/2.11               (equivalent @ (equivalent @ X3 @ X1) @ (equivalent @ X2 @ X1)) @ 
% 9.86/2.11               X0)))),
% 9.86/2.11      inference('s_sup-', [status(thm)], [zip_derived_cl23, zip_derived_cl0])).
% 9.86/2.11  thf(zip_derived_cl1974, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ~ (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ X1 @ X0) @ 
% 9.86/2.11             (equivalent @ a @ (equivalent @ X0 @ c))))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl1958, zip_derived_cl24])).
% 9.86/2.11  thf(zip_derived_cl751, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ( (is_a_theorem @ (equivalent @ X1 @ X0))
% 9.86/2.11          | ~ (is_a_theorem @ (equivalent @ X0 @ X1)))),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl679, zip_derived_cl18])).
% 9.86/2.11  thf(zip_derived_cl2025, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i]:
% 9.86/2.11         ~ (is_a_theorem @ 
% 9.86/2.11            (equivalent @ (equivalent @ a @ (equivalent @ X0 @ c)) @ 
% 9.86/2.11             (equivalent @ X1 @ X0)))),
% 9.86/2.11      inference('s_sup+', [status(thm)],
% 9.86/2.11                [zip_derived_cl1974, zip_derived_cl751])).
% 9.86/2.11  thf(zip_derived_cl1, plain,
% 9.86/2.11      (![X0 : $i, X1 : $i, X2 : $i, X3 : $i]:
% 9.86/2.11          (is_a_theorem @ 
% 9.86/2.11           (equivalent @ X0 @ 
% 9.86/2.11            (equivalent @ X0 @ 
% 9.86/2.11             (equivalent @ (equivalent @ X1 @ X2) @ 
% 9.86/2.11              (equivalent @ (equivalent @ X1 @ X3) @ (equivalent @ X2 @ X3))))))),
% 9.86/2.11      inference('cnf', [status(esa)], [lg_2])).
% 9.86/2.11  thf(zip_derived_cl2047, plain, ($false),
% 9.86/2.11      inference('s_sup+', [status(thm)], [zip_derived_cl2025, zip_derived_cl1])).
% 9.86/2.11  
% 9.86/2.11  % SZS output end Refutation
% 9.86/2.11  
% 9.86/2.11  
% 9.86/2.11  % Terminating...
% 2.72/2.15  % Runner terminated.
% 2.72/2.17  % Zipperpin 1.5 exiting
%------------------------------------------------------------------------------