%------------------------------------------------------------------------------
% File : Z3---4.15.1
% Problem : SET880+1 : TPTP v9.0.0. Released v3.2.0.
% Transfm : none
% Format : tptp
% Command : run_E %s %d THM
% Computer : n016.cluster.edu
% Model : x86_64 x86_64
% CPU : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory : 8042.1875MB
% OS : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit : 300s
% DateTime : Sat Jun 21 05:26:35 AM UTC 2025
% Result : Theorem 0.15s 0.41s
% Output : Proof 0.15s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.08/0.15 % Problem : SET880+1 : TPTP v9.0.0. Released v3.2.0.
% 0.08/0.15 % Command : run_E %s %d THM
% 0.15/0.37 % Computer : n016.cluster.edu
% 0.15/0.37 % Model : x86_64 x86_64
% 0.15/0.37 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.37 % Memory : 8042.1875MB
% 0.15/0.37 % OS : Linux 3.10.0-693.el7.x86_64
% 0.15/0.37 % CPULimit : 300
% 0.15/0.37 % WCLimit : 300
% 0.15/0.37 % DateTime : Fri Jun 20 05:50:02 EDT 2025
% 0.15/0.37 % CPUTime :
% 0.15/0.41 % SZS status Theorem
% 0.15/0.41 % SZS output start Proof
% 0.15/0.41 tff(tptp_fun_B_3_type, type, (
% 0.15/0.41 tptp_fun_B_3: $i)).
% 0.15/0.41 tff(tptp_fun_A_4_type, type, (
% 0.15/0.41 tptp_fun_A_4: $i)).
% 0.15/0.41 tff(in_type, type, (
% 0.15/0.41 in: ( $i * $i ) > $o)).
% 0.15/0.41 tff(singleton_type, type, (
% 0.15/0.41 singleton: $i > $i)).
% 0.15/0.41 tff(empty_set_type, type, (
% 0.15/0.41 empty_set: $i)).
% 0.15/0.41 tff(set_difference_type, type, (
% 0.15/0.41 set_difference: ( $i * $i ) > $i)).
% 0.15/0.41 tff(tptp_fun_C_0_type, type, (
% 0.15/0.41 tptp_fun_C_0: ( $i * $i ) > $i)).
% 0.15/0.41 tff(1,plain,
% 0.15/0.41 (^[A: $i, B: $i] : refl(((set_difference(singleton(A), B) = empty_set) <=> in(A, B)) <=> ((set_difference(singleton(A), B) = empty_set) <=> in(A, B)))),
% 0.15/0.41 inference(bind,[status(th)],[])).
% 0.15/0.41 tff(2,plain,
% 0.15/0.41 (![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B)) <=> ![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))),
% 0.15/0.41 inference(quant_intro,[status(thm)],[1])).
% 0.15/0.41 tff(3,plain,
% 0.15/0.41 (![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B)) <=> ![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))),
% 0.15/0.41 inference(rewrite,[status(thm)],[])).
% 0.15/0.41 tff(4,axiom,(![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))), file('/export/starexec/sandbox2/benchmark/theBenchmark.p','l36_zfmisc_1')).
% 0.15/0.41 tff(5,plain,
% 0.15/0.41 (![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[4, 3])).
% 0.15/0.41 tff(6,plain,(
% 0.15/0.41 ![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))),
% 0.15/0.41 inference(skolemize,[status(sab)],[5])).
% 0.15/0.41 tff(7,plain,
% 0.15/0.41 (![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[6, 2])).
% 0.15/0.41 tff(8,plain,
% 0.15/0.41 ((~![A: $i, B: $i] : ((set_difference(singleton(A), B) = empty_set) <=> in(A, B))) | ((set_difference(singleton(A!4), singleton(B!3)) = empty_set) <=> in(A!4, singleton(B!3)))),
% 0.15/0.41 inference(quant_inst,[status(thm)],[])).
% 0.15/0.41 tff(9,plain,
% 0.15/0.41 ((set_difference(singleton(A!4), singleton(B!3)) = empty_set) <=> in(A!4, singleton(B!3))),
% 0.15/0.41 inference(unit_resolution,[status(thm)],[8, 7])).
% 0.15/0.41 tff(10,plain,
% 0.15/0.41 ((~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B))) <=> (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B)))),
% 0.15/0.41 inference(rewrite,[status(thm)],[])).
% 0.15/0.41 tff(11,plain,
% 0.15/0.41 ((~![A: $i, B: $i] : ((set_difference(singleton(A), singleton(B)) = empty_set) => (A = B))) <=> (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B)))),
% 0.15/0.41 inference(rewrite,[status(thm)],[])).
% 0.15/0.41 tff(12,axiom,(~![A: $i, B: $i] : ((set_difference(singleton(A), singleton(B)) = empty_set) => (A = B))), file('/export/starexec/sandbox2/benchmark/theBenchmark.p','t21_zfmisc_1')).
% 0.15/0.41 tff(13,plain,
% 0.15/0.41 (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[12, 11])).
% 0.15/0.41 tff(14,plain,
% 0.15/0.41 (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[13, 10])).
% 0.15/0.41 tff(15,plain,
% 0.15/0.41 (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[14, 10])).
% 0.15/0.41 tff(16,plain,
% 0.15/0.41 (~![A: $i, B: $i] : ((~(set_difference(singleton(A), singleton(B)) = empty_set)) | (A = B))),
% 0.15/0.41 inference(modus_ponens,[status(thm)],[15, 10])).
% 0.15/0.41 tff(17,plain,(
% 0.15/0.41 ~((~(set_difference(singleton(A!4), singleton(B!3)) = empty_set)) | (A!4 = B!3))),
% 0.15/0.41 inference(skolemize,[status(sab)],[16])).
% 0.15/0.41 tff(18,plain,
% 0.15/0.41 (set_difference(singleton(A!4), singleton(B!3)) = empty_set),
% 0.15/0.41 inference(or_elim,[status(thm)],[17])).
% 0.15/0.41 tff(19,plain,
% 0.15/0.41 ((~((set_difference(singleton(A!4), singleton(B!3)) = empty_set) <=> in(A!4, singleton(B!3)))) | (~(set_difference(singleton(A!4), singleton(B!3)) = empty_set)) | in(A!4, singleton(B!3))),
% 0.15/0.41 inference(tautology,[status(thm)],[])).
% 0.15/0.41 tff(20,plain,
% 0.15/0.41 ((~((set_difference(singleton(A!4), singleton(B!3)) = empty_set) <=> in(A!4, singleton(B!3)))) | in(A!4, singleton(B!3))),
% 0.15/0.41 inference(unit_resolution,[status(thm)],[19, 18])).
% 0.15/0.41 tff(21,plain,
% 0.15/0.41 (in(A!4, singleton(B!3))),
% 0.15/0.41 inference(unit_resolution,[status(thm)],[20, 9])).
% 0.15/0.41 tff(22,plain,
% 0.15/0.41 (~(A!4 = B!3)),
% 0.15/0.41 inference(or_elim,[status(thm)],[17])).
% 0.15/0.41 tff(23,plain,
% 0.15/0.41 ((~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))) | (~in(A!4, singleton(B!3))) | (A!4 = B!3)),
% 0.15/0.41 inference(tautology,[status(thm)],[])).
% 0.15/0.41 tff(24,plain,
% 0.15/0.41 (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.41 inference(unit_resolution,[status(thm)],[23, 22, 21])).
% 0.15/0.41 tff(25,plain,
% 0.15/0.41 (^[A: $i, B: $i, C: $i] : refl((~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))))),
% 0.15/0.41 inference(bind,[status(th)],[])).
% 0.15/0.41 tff(26,plain,
% 0.15/0.41 (![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(quant_intro,[status(thm)],[25])).
% 0.15/0.41 tff(27,plain,
% 0.15/0.41 (![A: $i, B: $i] : ![C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(pull_quant,[status(thm)],[])).
% 0.15/0.41 tff(28,plain,
% 0.15/0.41 (^[A: $i, B: $i] : trans(monotonicity(trans(monotonicity(trans(monotonicity(pull_quant(((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) <=> ![C: $i] : ((~(B = singleton(A))) | (in(C, B) <=> (C = A)))), ((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) <=> (~![C: $i] : ((~(B = singleton(A))) | (in(C, B) <=> (C = A)))))), pull_quant((~![C: $i] : ((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) <=> ?[C: $i] : (~((~(B = singleton(A))) | (in(C, B) <=> (C = A))))), ((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) <=> ?[C: $i] : (~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))))), (((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))) <=> (?[C: $i] : (~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))), pull_quant((?[C: $i] : (~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))) <=> ?[C: $i] : ((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))), (((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))) <=> ?[C: $i] : ((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))), ((~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> (~?[C: $i] : ((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))))), pull_quant((~?[C: $i] : ((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))), ((~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))))),
% 0.15/0.41 inference(bind,[status(th)],[])).
% 0.15/0.41 tff(29,plain,
% 0.15/0.41 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i] : ![C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(quant_intro,[status(thm)],[28])).
% 0.15/0.41 tff(30,plain,
% 0.15/0.41 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(transitivity,[status(thm)],[29, 27])).
% 0.15/0.41 tff(31,plain,
% 0.15/0.41 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(transitivity,[status(thm)],[30, 26])).
% 0.15/0.41 tff(32,plain,
% 0.15/0.41 (^[A: $i, B: $i] : rewrite((~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))))),
% 0.15/0.41 inference(bind,[status(th)],[])).
% 0.15/0.41 tff(33,plain,
% 0.15/0.41 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(quant_intro,[status(thm)],[32])).
% 0.15/0.41 tff(34,plain,
% 0.15/0.41 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))) <=> ![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.41 inference(transitivity,[status(thm)],[33, 31])).
% 0.15/0.41 tff(35,plain,
% 0.15/0.41 (^[A: $i, B: $i] : trans(monotonicity(rewrite(((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) <=> ((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))), trans(monotonicity(rewrite((~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))) <=> (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))), (((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))) <=> ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))), rewrite(((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))) <=> ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))), (((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))) <=> ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))), ((((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))) <=> (((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))))), rewrite((((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))) <=> (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))), ((((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))) <=> (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))))),
% 0.15/0.42 inference(bind,[status(th)],[])).
% 0.15/0.42 tff(36,plain,
% 0.15/0.42 (![A: $i, B: $i] : (((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A))))) <=> ![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.42 inference(quant_intro,[status(thm)],[35])).
% 0.15/0.42 tff(37,plain,
% 0.15/0.42 (![A: $i, B: $i] : ((B = singleton(A)) <=> ![C: $i] : (in(C, B) <=> (C = A))) <=> ![A: $i, B: $i] : ((B = singleton(A)) <=> ![C: $i] : (in(C, B) <=> (C = A)))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(38,axiom,(![A: $i, B: $i] : ((B = singleton(A)) <=> ![C: $i] : (in(C, B) <=> (C = A)))), file('/export/starexec/sandbox2/benchmark/theBenchmark.p','d1_tarski')).
% 0.15/0.42 tff(39,plain,
% 0.15/0.42 (![A: $i, B: $i] : ((B = singleton(A)) <=> ![C: $i] : (in(C, B) <=> (C = A)))),
% 0.15/0.42 inference(modus_ponens,[status(thm)],[38, 37])).
% 0.15/0.42 tff(40,plain,(
% 0.15/0.42 ![A: $i, B: $i] : (((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A))) & ((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))),
% 0.15/0.42 inference(skolemize,[status(sab)],[39])).
% 0.15/0.42 tff(41,plain,
% 0.15/0.42 (![A: $i, B: $i] : (~((~((~(B = singleton(A))) | ![C: $i] : (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.42 inference(modus_ponens,[status(thm)],[40, 36])).
% 0.15/0.42 tff(42,plain,
% 0.15/0.42 (![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))),
% 0.15/0.42 inference(modus_ponens,[status(thm)],[41, 34])).
% 0.15/0.42 tff(43,plain,
% 0.15/0.42 (((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3))) <=> ((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(44,plain,
% 0.15/0.42 ((~(~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) <=> (in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(45,plain,
% 0.15/0.42 (((~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))) | $false) <=> (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(46,plain,
% 0.15/0.42 ((~$true) <=> $false),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(47,plain,
% 0.15/0.42 (($true | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))) <=> $true),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(48,plain,
% 0.15/0.42 ((~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))) <=> (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(49,plain,
% 0.15/0.42 ((singleton(B!3) = singleton(B!3)) <=> $true),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(50,plain,
% 0.15/0.42 (((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))) <=> ($true | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))))),
% 0.15/0.42 inference(monotonicity,[status(thm)],[49, 48])).
% 0.15/0.42 tff(51,plain,
% 0.15/0.42 (((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))) <=> $true),
% 0.15/0.42 inference(transitivity,[status(thm)],[50, 47])).
% 0.15/0.42 tff(52,plain,
% 0.15/0.42 ((~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))))) <=> (~$true)),
% 0.15/0.42 inference(monotonicity,[status(thm)],[51])).
% 0.15/0.42 tff(53,plain,
% 0.15/0.42 ((~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))))) <=> $false),
% 0.15/0.42 inference(transitivity,[status(thm)],[52, 46])).
% 0.15/0.42 tff(54,plain,
% 0.15/0.42 ((~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))) <=> (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(55,plain,
% 0.15/0.42 (($false | (in(A!4, singleton(B!3)) <=> (A!4 = B!3))) <=> (in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.42 inference(rewrite,[status(thm)],[])).
% 0.15/0.42 tff(56,plain,
% 0.15/0.42 ((~(singleton(B!3) = singleton(B!3))) <=> (~$true)),
% 0.15/0.42 inference(monotonicity,[status(thm)],[49])).
% 0.15/0.42 tff(57,plain,
% 0.15/0.42 ((~(singleton(B!3) = singleton(B!3))) <=> $false),
% 0.15/0.42 inference(transitivity,[status(thm)],[56, 46])).
% 0.15/0.42 tff(58,plain,
% 0.15/0.42 (((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3))) <=> ($false | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(monotonicity,[status(thm)],[57])).
% 0.15/0.42 tff(59,plain,
% 0.15/0.42 (((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3))) <=> (in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.42 inference(transitivity,[status(thm)],[58, 55])).
% 0.15/0.42 tff(60,plain,
% 0.15/0.42 ((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) <=> (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(monotonicity,[status(thm)],[59])).
% 0.15/0.42 tff(61,plain,
% 0.15/0.42 ((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) <=> (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(transitivity,[status(thm)],[60, 54])).
% 0.15/0.42 tff(62,plain,
% 0.15/0.42 (((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))))) <=> ((~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))) | $false)),
% 0.15/0.42 inference(monotonicity,[status(thm)],[61, 53])).
% 0.15/0.42 tff(63,plain,
% 0.15/0.42 (((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))))) <=> (~(in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(transitivity,[status(thm)],[62, 45])).
% 0.15/0.42 tff(64,plain,
% 0.15/0.42 ((~((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))))))) <=> (~(~(in(A!4, singleton(B!3)) <=> (A!4 = B!3))))),
% 0.15/0.42 inference(monotonicity,[status(thm)],[63])).
% 0.15/0.42 tff(65,plain,
% 0.15/0.42 ((~((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3))))))) <=> (in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.42 inference(transitivity,[status(thm)],[64, 44])).
% 0.15/0.42 tff(66,plain,
% 0.15/0.42 (((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (~((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))))))) <=> ((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(monotonicity,[status(thm)],[65])).
% 0.15/0.42 tff(67,plain,
% 0.15/0.42 (((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (~((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))))))) <=> ((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))),
% 0.15/0.42 inference(transitivity,[status(thm)],[66, 43])).
% 0.15/0.42 tff(68,plain,
% 0.15/0.42 ((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (~((~((~(singleton(B!3) = singleton(B!3))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3)))) | (~((singleton(B!3) = singleton(B!3)) | (~(in(tptp_fun_C_0(singleton(B!3), B!3), singleton(B!3)) <=> (tptp_fun_C_0(singleton(B!3), B!3) = B!3)))))))),
% 0.15/0.42 inference(quant_inst,[status(thm)],[])).
% 0.15/0.42 tff(69,plain,
% 0.15/0.42 ((~![A: $i, B: $i, C: $i] : (~((~((~(B = singleton(A))) | (in(C, B) <=> (C = A)))) | (~((B = singleton(A)) | (~(in(tptp_fun_C_0(B, A), B) <=> (tptp_fun_C_0(B, A) = A)))))))) | (in(A!4, singleton(B!3)) <=> (A!4 = B!3))),
% 0.15/0.42 inference(modus_ponens,[status(thm)],[68, 67])).
% 0.15/0.42 tff(70,plain,
% 0.15/0.42 ($false),
% 0.15/0.42 inference(unit_resolution,[status(thm)],[69, 42, 24])).
% 0.15/0.42 % SZS output end Proof
% 0.15/0.43 % E exiting
%------------------------------------------------------------------------------