exact psi_ih vs h1_right
case right
σ : Instantiation
τ : MetaInstantiation
phi psi : Formula
phi_ih :
  ∀ (vs : List VarName), NoMetaVarAndAllFreeInList vs phi → NoMetaVarAndAllFreeInList (List.map (↑σ) vs) (sub σ τ phi)
psi_ih :
  ∀ (vs : List VarName), NoMetaVarAndAllFreeInList vs psi → NoMetaVarAndAllFreeInList (List.map (↑σ) vs) (sub σ τ psi)
vs : List VarName
h1_left : NoMetaVarAndAllFreeInList vs phi
h1_right : NoMetaVarAndAllFreeInList vs psi
⊢ NoMetaVarAndAllFreeInList (List.map (↑σ) vs) (sub σ τ psi)
no goals