% Mizar problem: t2_gate_1,gate_1,48,66 
fof(t2_gate_1, conjecture,  (! [A] :  ( ~ (v1_xboole_0(k1_gate_1(A)))  <=> v1_xboole_0(A)) ) ).
fof(dt_k1_gate_1, axiom, $true).
fof(fc1_gate_1, axiom,  (! [A] :  (v1_xboole_0(A) =>  ~ (v1_xboole_0(k1_gate_1(A))) ) ) ).
fof(fc2_gate_1, axiom,  (! [A] :  ( ~ (v1_xboole_0(A))  => v1_xboole_0(k1_gate_1(A))) ) ).
fof(rc1_xboole_0, axiom,  (? [A] : v1_xboole_0(A)) ).
fof(rc2_xboole_0, axiom,  (? [A] :  ~ (v1_xboole_0(A)) ) ).
