TSTP Solution File: LCL067-1 by Twee---2.4.2
View Problem
- Process Solution
%------------------------------------------------------------------------------
% File : Twee---2.4.2
% Problem : LCL067-1 : TPTP v8.1.2. Released v1.0.0.
% Transfm : none
% Format : tptp:raw
% Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% Computer : n001.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 : Thu Aug 31 08:17:15 EDT 2023
% Result : Unsatisfiable 23.32s 3.44s
% Output : Proof 23.32s
% Verified :
% SZS Type : -
% Comments :
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.00/0.13 % Problem : LCL067-1 : TPTP v8.1.2. Released v1.0.0.
% 0.00/0.14 % Command : parallel-twee %s --tstp --conditional-encoding if --smaller --drop-non-horn --give-up-on-saturation --explain-encoding --formal-proof
% 0.15/0.35 % Computer : n001.cluster.edu
% 0.15/0.35 % Model : x86_64 x86_64
% 0.15/0.35 % CPU : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.15/0.35 % Memory : 8042.1875MB
% 0.15/0.35 % OS : Linux 3.10.0-693.el7.x86_64
% 0.15/0.35 % CPULimit : 300
% 0.15/0.35 % WCLimit : 300
% 0.15/0.35 % DateTime : Thu Aug 24 19:03:26 EDT 2023
% 0.15/0.35 % CPUTime :
% 23.32/3.44 Command-line arguments: --flatten
% 23.32/3.44
% 23.32/3.44 % SZS status Unsatisfiable
% 23.32/3.44
% 23.32/3.45 % SZS output start Proof
% 23.32/3.45 Take the following subset of the input axioms:
% 23.32/3.45 fof(cn_19, axiom, ![X, Y, Z]: is_a_theorem(implies(implies(implies(X, Y), Z), implies(Y, Z)))).
% 23.32/3.45 fof(cn_37, axiom, ![X2, Y2, Z2]: is_a_theorem(implies(implies(implies(X2, Y2), Z2), implies(not(X2), Z2)))).
% 23.32/3.45 fof(cn_59, axiom, ![X2, Y2, Z2]: is_a_theorem(implies(implies(not(X2), Z2), implies(implies(Y2, Z2), implies(implies(X2, Y2), Z2))))).
% 23.32/3.45 fof(condensed_detachment, axiom, ![X2, Y2]: (~is_a_theorem(implies(X2, Y2)) | (~is_a_theorem(X2) | is_a_theorem(Y2)))).
% 23.32/3.45 fof(prove_cn_1, negated_conjecture, ~is_a_theorem(implies(implies(a, b), implies(implies(b, c), implies(a, c))))).
% 23.32/3.45
% 23.32/3.45 Now clausify the problem and encode Horn clauses using encoding 3 of
% 23.32/3.45 http://www.cse.chalmers.se/~nicsma/papers/horn.pdf.
% 23.32/3.45 We repeatedly replace C & s=t => u=v by the two clauses:
% 23.32/3.45 fresh(y, y, x1...xn) = u
% 23.32/3.45 C => fresh(s, t, x1...xn) = v
% 23.32/3.45 where fresh is a fresh function symbol and x1..xn are the free
% 23.32/3.45 variables of u and v.
% 23.32/3.45 A predicate p(X) is encoded as p(X)=true (this is sound, because the
% 23.32/3.45 input problem has no model of domain size 1).
% 23.32/3.45
% 23.32/3.45 The encoding turns the above axioms into the following unit equations and goals:
% 23.32/3.45
% 23.32/3.45 Axiom 1 (condensed_detachment): fresh2(X, X, Y) = true.
% 23.32/3.45 Axiom 2 (condensed_detachment): fresh(X, X, Y, Z) = is_a_theorem(Z).
% 23.32/3.45 Axiom 3 (condensed_detachment): fresh(is_a_theorem(implies(X, Y)), true, X, Y) = fresh2(is_a_theorem(X), true, Y).
% 23.32/3.45 Axiom 4 (cn_19): is_a_theorem(implies(implies(implies(X, Y), Z), implies(Y, Z))) = true.
% 23.32/3.45 Axiom 5 (cn_37): is_a_theorem(implies(implies(implies(X, Y), Z), implies(not(X), Z))) = true.
% 23.32/3.45 Axiom 6 (cn_59): is_a_theorem(implies(implies(not(X), Y), implies(implies(Z, Y), implies(implies(X, Z), Y)))) = true.
% 23.32/3.45
% 23.32/3.45 Lemma 7: fresh2(is_a_theorem(implies(implies(X, Y), Z)), true, implies(Y, Z)) = is_a_theorem(implies(Y, Z)).
% 23.32/3.45 Proof:
% 23.32/3.45 fresh2(is_a_theorem(implies(implies(X, Y), Z)), true, implies(Y, Z))
% 23.32/3.45 = { by axiom 3 (condensed_detachment) R->L }
% 23.32/3.45 fresh(is_a_theorem(implies(implies(implies(X, Y), Z), implies(Y, Z))), true, implies(implies(X, Y), Z), implies(Y, Z))
% 23.32/3.45 = { by axiom 4 (cn_19) }
% 23.32/3.45 fresh(true, true, implies(implies(X, Y), Z), implies(Y, Z))
% 23.32/3.45 = { by axiom 2 (condensed_detachment) }
% 23.32/3.45 is_a_theorem(implies(Y, Z))
% 23.32/3.45
% 23.32/3.45 Lemma 8: is_a_theorem(implies(X, implies(Y, X))) = true.
% 23.32/3.45 Proof:
% 23.32/3.45 is_a_theorem(implies(X, implies(Y, X)))
% 23.32/3.45 = { by lemma 7 R->L }
% 23.32/3.45 fresh2(is_a_theorem(implies(implies(implies(Z, Y), X), implies(Y, X))), true, implies(X, implies(Y, X)))
% 23.32/3.45 = { by axiom 4 (cn_19) }
% 23.32/3.45 fresh2(true, true, implies(X, implies(Y, X)))
% 23.32/3.45 = { by axiom 1 (condensed_detachment) }
% 23.32/3.45 true
% 23.32/3.45
% 23.32/3.45 Lemma 9: fresh2(is_a_theorem(implies(implies(X, Y), Z)), true, implies(not(X), Z)) = is_a_theorem(implies(not(X), Z)).
% 23.32/3.45 Proof:
% 23.32/3.45 fresh2(is_a_theorem(implies(implies(X, Y), Z)), true, implies(not(X), Z))
% 23.32/3.45 = { by axiom 3 (condensed_detachment) R->L }
% 23.32/3.45 fresh(is_a_theorem(implies(implies(implies(X, Y), Z), implies(not(X), Z))), true, implies(implies(X, Y), Z), implies(not(X), Z))
% 23.32/3.45 = { by axiom 5 (cn_37) }
% 23.32/3.45 fresh(true, true, implies(implies(X, Y), Z), implies(not(X), Z))
% 23.32/3.45 = { by axiom 2 (condensed_detachment) }
% 23.32/3.45 is_a_theorem(implies(not(X), Z))
% 23.32/3.45
% 23.32/3.45 Lemma 10: fresh2(is_a_theorem(implies(not(X), Y)), true, implies(implies(Z, Y), implies(implies(X, Z), Y))) = is_a_theorem(implies(implies(Z, Y), implies(implies(X, Z), Y))).
% 23.32/3.45 Proof:
% 23.32/3.45 fresh2(is_a_theorem(implies(not(X), Y)), true, implies(implies(Z, Y), implies(implies(X, Z), Y)))
% 23.32/3.45 = { by axiom 3 (condensed_detachment) R->L }
% 23.32/3.45 fresh(is_a_theorem(implies(implies(not(X), Y), implies(implies(Z, Y), implies(implies(X, Z), Y)))), true, implies(not(X), Y), implies(implies(Z, Y), implies(implies(X, Z), Y)))
% 23.32/3.45 = { by axiom 6 (cn_59) }
% 23.32/3.45 fresh(true, true, implies(not(X), Y), implies(implies(Z, Y), implies(implies(X, Z), Y)))
% 23.32/3.45 = { by axiom 2 (condensed_detachment) }
% 23.32/3.45 is_a_theorem(implies(implies(Z, Y), implies(implies(X, Z), Y)))
% 23.32/3.45
% 23.32/3.45 Lemma 11: is_a_theorem(implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W))))) = true.
% 23.32/3.45 Proof:
% 23.32/3.45 is_a_theorem(implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W)))))
% 23.32/3.45 = { by lemma 10 R->L }
% 23.32/3.45 fresh2(is_a_theorem(implies(not(Z), implies(Y, implies(Z, W)))), true, implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W)))))
% 23.32/3.45 = { by lemma 9 R->L }
% 23.32/3.45 fresh2(fresh2(is_a_theorem(implies(implies(Z, W), implies(Y, implies(Z, W)))), true, implies(not(Z), implies(Y, implies(Z, W)))), true, implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W)))))
% 23.32/3.45 = { by lemma 8 }
% 23.32/3.45 fresh2(fresh2(true, true, implies(not(Z), implies(Y, implies(Z, W)))), true, implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W)))))
% 23.32/3.45 = { by axiom 1 (condensed_detachment) }
% 23.32/3.45 fresh2(true, true, implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W)))))
% 23.32/3.45 = { by axiom 1 (condensed_detachment) }
% 23.32/3.45 true
% 23.32/3.45
% 23.32/3.45 Lemma 12: fresh2(is_a_theorem(implies(X, implies(Y, implies(Z, W)))), true, implies(implies(Z, X), implies(Y, implies(Z, W)))) = is_a_theorem(implies(implies(Z, X), implies(Y, implies(Z, W)))).
% 23.32/3.45 Proof:
% 23.32/3.45 fresh2(is_a_theorem(implies(X, implies(Y, implies(Z, W)))), true, implies(implies(Z, X), implies(Y, implies(Z, W))))
% 23.32/3.45 = { by axiom 3 (condensed_detachment) R->L }
% 23.32/3.45 fresh(is_a_theorem(implies(implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W))))), true, implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W))))
% 23.32/3.45 = { by lemma 11 }
% 23.32/3.45 fresh(true, true, implies(X, implies(Y, implies(Z, W))), implies(implies(Z, X), implies(Y, implies(Z, W))))
% 23.32/3.45 = { by axiom 2 (condensed_detachment) }
% 23.32/3.45 is_a_theorem(implies(implies(Z, X), implies(Y, implies(Z, W))))
% 23.32/3.45
% 23.32/3.45 Goal 1 (prove_cn_1): is_a_theorem(implies(implies(a, b), implies(implies(b, c), implies(a, c)))) = true.
% 23.32/3.45 Proof:
% 23.32/3.45 is_a_theorem(implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.45 = { by axiom 2 (condensed_detachment) R->L }
% 23.32/3.45 fresh(true, true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.45 = { by axiom 1 (condensed_detachment) R->L }
% 23.32/3.45 fresh(fresh2(true, true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.45 = { by axiom 1 (condensed_detachment) R->L }
% 23.32/3.45 fresh(fresh2(fresh2(true, true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(true, true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(fresh2(true, true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(fresh2(fresh2(true, true, implies(implies(a, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 8 R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(fresh2(fresh2(is_a_theorem(implies(implies(implies(b, c), implies(a, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(a, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 7 }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(fresh2(is_a_theorem(implies(implies(a, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 7 }
% 23.32/3.46 fresh(fresh2(fresh2(fresh2(is_a_theorem(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 3 (condensed_detachment) R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(is_a_theorem(implies(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c)))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 10 R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(fresh2(is_a_theorem(implies(not(b), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c)))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 9 R->L }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(fresh2(fresh2(is_a_theorem(implies(implies(b, implies(implies(b, c), implies(a, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(not(b), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c)))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 11 }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(fresh2(fresh2(true, true, implies(not(b), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c)))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(fresh2(true, true, implies(implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c)))))), true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) }
% 23.32/3.46 fresh(fresh2(fresh2(fresh(true, true, implies(c, implies(implies(a, b), implies(implies(b, c), implies(a, c)))), implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 2 (condensed_detachment) }
% 23.32/3.46 fresh(fresh2(fresh2(is_a_theorem(implies(implies(b, c), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 12 }
% 23.32/3.46 fresh(fresh2(is_a_theorem(implies(implies(implies(b, c), implies(b, c)), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 12 }
% 23.32/3.46 fresh(is_a_theorem(implies(implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))), true, implies(implies(b, c), implies(implies(b, c), implies(b, c))), implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 3 (condensed_detachment) }
% 23.32/3.46 fresh2(is_a_theorem(implies(implies(b, c), implies(implies(b, c), implies(b, c)))), true, implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by lemma 8 }
% 23.32/3.46 fresh2(true, true, implies(implies(a, b), implies(implies(b, c), implies(a, c))))
% 23.32/3.46 = { by axiom 1 (condensed_detachment) }
% 23.32/3.46 true
% 23.32/3.46 % SZS output end Proof
% 23.32/3.46
% 23.32/3.46 RESULT: Unsatisfiable (the axioms are contradictory).
%------------------------------------------------------------------------------