% Mizar problem: t3_tarski,tarski,98,50 
fof(t3_tarski, conjecture,  (! [A] :  (! [B] :  ~ ( (r2_hidden(A, B) &  (! [C] :  ~ ( (r2_hidden(C, B) &  (! [D] :  ~ ( (r2_hidden(D, B) & r2_hidden(D, C)) ) ) ) ) ) ) ) ) ) ).
fof(antisymmetry_r2_hidden, axiom,  (! [A, B] :  (r2_hidden(A, B) =>  ~ (r2_hidden(B, A)) ) ) ).
fof(t5_tarski_0, axiom,  (! [A] :  (! [B] :  ~ ( (r2_hidden(A, B) &  (! [C] :  ~ ( (r2_hidden(C, B) &  (! [D] :  ~ ( (r2_hidden(D, B) & r2_hidden(D, C)) ) ) ) ) ) ) ) ) ) ).
