have h' : a = b := by apply AutoImpl.injectivity_axiom; apply h
α : Type u
a b : α
h : AutoImpl a = AutoImpl b
⊢ val (Eq.mpr h finish) = b
α : Type u
a b : α
h : AutoImpl a = AutoImpl b
h' : a = b
⊢ val (Eq.mpr h finish) = b