% Mizar problem: t12_gate_1,gate_1,212,68 
fof(t12_gate_1, conjecture,  (! [A] :  (! [B] :  ( ~ ( ( ~ (v1_xboole_0(k6_gate_1(A, B)))  &  ( ~ (v1_xboole_0(A))  &  ~ (v1_xboole_0(B)) ) ) )  &  ~ ( ( ~ ( ( ~ (v1_xboole_0(A))  &  ~ (v1_xboole_0(B)) ) )  & v1_xboole_0(k6_gate_1(A, B))) ) ) ) ) ).
fof(commutativity_k6_gate_1, axiom,  (! [A, B] : k6_gate_1(A, B)=k6_gate_1(B, A)) ).
fof(dt_k6_gate_1, axiom, $true).
fof(fc13_gate_1, axiom,  (! [A, B] :  (v1_xboole_0(A) =>  ~ (v1_xboole_0(k6_gate_1(A, B))) ) ) ).
fof(fc14_gate_1, axiom,  (! [A, B] :  ( ( ~ (v1_xboole_0(A))  &  ~ (v1_xboole_0(B)) )  => v1_xboole_0(k6_gate_1(A, B))) ) ).
fof(rc1_xboole_0, axiom,  (? [A] : v1_xboole_0(A)) ).
fof(rc2_xboole_0, axiom,  (? [A] :  ~ (v1_xboole_0(A)) ) ).
