apply IsDeduct.axiom_
F : Formula
h1_v h1_t : VarName
h1_phi h1_phi' : Formula
h1_1 : fastAdmits h1_v h1_t h1_phi
h1_ih_1 : fastReplaceFree h1_v h1_t h1_phi = h1_phi'
⊢ IsDeduct ∅ ((forall_ h1_v h1_phi).imp_ h1_phi')
case a
F : Formula
h1_v h1_t : VarName
h1_phi h1_phi' : Formula
h1_1 : fastAdmits h1_v h1_t h1_phi
h1_ih_1 : fastReplaceFree h1_v h1_t h1_phi = h1_phi'
⊢ IsAxiom ((forall_ h1_v h1_phi).imp_ h1_phi')