false-eq

Theorem.

Arguments:

phi (pr), psi (pr),

Assertions:

((lnotphiwedgelnotpsi)to(phileftrightarrowpsi))

Proof:

Hyp Ref Line Expr
true-eq1((lnotphiwedgelnotpsi)to(lnotphileftrightarrowlnotpsi))
1conb2((lnotphiwedgelnotpsi)to(phileftrightarrowpsi))