% Mizar problem: t2_gate_1,gate_1,25,29 
fof(t2_gate_1,conjecture,(
    ~ ! [A] : v1_xboole_0(A) ),
    inference(mizar_bg_added,[status(thm)],[antisymmetry_r2_hidden,dt_k1_xboole_0,fc1_xboole_0,fraenkel_a_0_0_gate_1,rc1_xboole_0,rc2_xboole_0,t2_tarski,t6_boole,t7_boole,t8_boole]),
    [file(gate_1,t2_gate_1)]).

fof(antisymmetry_r2_hidden,axiom,(
    ! [A,B] : 
      ( r2_hidden(A,B)
     => ~ r2_hidden(B,A) ) ),
    file(hidden,r2_hidden),
    []).

fof(dt_k1_xboole_0,axiom,(
    $true ),
    file(xboole_0,k1_xboole_0),
    []).

fof(fc1_xboole_0,axiom,(
    v1_xboole_0(k1_xboole_0) ),
    file(xboole_0,fc1_xboole_0),
    []).
ERROR: Line 6 Char 83 Token "]" continuing with " : A=k1_xboole_0) )"