case mp => intro h; exact ((this (length α)).mp h).right
α : Type
inst✝¹ : (n : Nat) → OfNat α n
inst✝ : UInt α
a : α
i : Nat
this : ∀ (n : Nat), i ∈ bitIndices.aux a n ↔ i < n ∧ UInt.getBit a i = true
⊢ i ∈ UInt.bitIndices a → UInt.getBit a i = true
no goals