next hnone =>
  absurd (Fin.find?_none i hnone)
  rw [decide_eq_false_iff_not]
  intro h
  apply h
  exact Setoid.refl ..
case h.mpr.a.h_2
n : Nat
s : Setoid (Fin n)
inst✝ : DecidableRel Setoid.r
k : Fin (quot s)
i : Fin n
h✝ : (Quotient.mk s i).liftOn (Fin.getRepr s) ⋯ = k
heq✝ : (Fin.find? fun b => decide (Setoid.r i b)) = none
h : absurd ⋯ ⋯ = k
⊢ (decodeSubtype (repr s) k).val ≈ i
no goals