SC
case h1.a.a
P Q : Formula
v : VarName
h1 : ¬isFreeIn v Q
⊢ IsDeduct {forall_ v (P.imp_ Q)}
    (((forall_ v Q.not_).imp_ (forall_ v P.not_)).imp_
      ((Q.not_.imp_ (forall_ v Q.not_)).imp_ ((forall_ v P.not_).not_.imp_ Q)))
no goals