case true_ =>
  unfold IsNotFree
  intro V d
  simp only [Holds]
D : Type
I : Interpretation D
M : MetaValuation D
E : Env
Γ : List (VarName × MetaVarName)
v : VarName
h2 : ∀ (X : MetaVarName), (v, X) ∈ Γ → IsNotFree D I M E (meta_var_ X) v
h1 : NotFree Γ v true_
⊢ IsNotFree D I M E true_ v
no goals