1 include "logic/equality.ma".
3 (* Inclusion of: COL086-1.p *)
5 (* -------------------------------------------------------------------------- *)
7 (* File : COL086-1 : TPTP v3.7.0. Released v2.6.0. *)
9 (* Domain : Combinatory Logic *)
11 (* Problem : Happy Birds, part 2 *)
13 (* Version : Especial. *)
17 (* Refs : [Smu85] Smullyan (1978), To Mock a Mocking Bird and Other Logi *)
23 (* Status : Unsatisfiable *)
25 (* Rating : 0.00 v2.6.0 *)
27 (* Syntax : Number of clauses : 2 ( 0 non-Horn; 2 unit; 2 RR) *)
29 (* Number of atoms : 2 ( 2 equality) *)
31 (* Maximal clause size : 1 ( 1 average) *)
33 (* Number of predicates : 1 ( 0 propositional; 2-2 arity) *)
35 (* Number of functors : 3 ( 2 constant; 0-2 arity) *)
37 (* Number of variables : 2 ( 2 singleton) *)
39 (* Maximal term depth : 2 ( 2 average) *)
41 (* Comments : A UEQ part of COL055-1 *)
43 (* -------------------------------------------------------------------------- *)
44 ntheorem prove_happiness_2:
45 (∀Univ:Type.∀A:Univ.∀B:Univ.
48 ∀response:∀_:Univ.∀_:Univ.Univ.
49 ∀H0:eq Univ (response a b) b.∃A:Univ.∃B:Univ.eq Univ (response a B) A)
58 napply (ex_intro ? ? ? ?) ##[
60 napply (ex_intro ? ? ? ?) ##[
65 ntry (nassumption) ##;
68 (* -------------------------------------------------------------------------- *)