all_goals exact ‹IsEmpty _›.elim $ Member.strict ‹LawfulMemUpdate ..›.member₁
case update.notMem
α : Type
inst✝ : Readable α
rtr rtr₁ : α
cpt : Component.Valued
i : ID
v : Value
rtr₂ : α
u✝ : LawfulMemUpdate cpt i v rtr rtr₁
h✝ : IsEmpty (Member (Component.val cpt) i rtr)
eq✝ : rtr = rtr₂
⊢ rtr₁ = rtr₂

case notMem.update
α : Type
inst✝ : Readable α
rtr rtr₁ : α
cpt : Component.Valued
i : ID
v : Value
rtr₂ : α
h✝ : IsEmpty (Member (Component.val cpt) i rtr)
eq✝ : rtr = rtr₁
u✝ : LawfulMemUpdate cpt i v rtr rtr₂
⊢ rtr₁ = rtr₂
no goals