rintro ⟨⟨Fs,δ⟩, ⟨Fδ_in, w_Con⟩⟩
case mpr
ψ : Formula
W : Type
M : KripkeModel W
w : W
α β : Program
⊢ (∃ Fδ ∈ H (α;'β), evaluate M w (Con (Yset Fδ ψ))) → ∃ Fδ ∈ H α, evaluate M w (Con (Yset Fδ (⌈β⌉ψ)))
case mpr.intro.mk.intro
ψ : Formula
W : Type
M : KripkeModel W
w : W
α β : Program
Fs : List Formula
δ : List Program
Fδ_in : (Fs, δ) ∈ H (α;'β)
w_Con : evaluate M w (Con (Yset (Fs, δ) ψ))
⊢ ∃ Fδ ∈ H α, evaluate M w (Con (Yset Fδ (⌈β⌉ψ)))