tauto
case h.right.right
φ ψ : Formula
hyp : φ⊨ψ
X : TNode := ([φ], [~ψ], none)
ctX : ClosedTableau ([], []) X
θ : Formula
W : Type
M : KripkeModel W
w : W
this : evaluate M w θ → evaluate M w ψ
⊢ evaluate M w θ → evaluate M w ψ
no goals