exact And.left
case mpr
n : Nat
h_ind :
  ∀ {i : Nat},
    getBit (Nat.lsb (n / 2 + 1)) i = true ↔
      getBit (n / 2 + 1) i = true ∧ ∀ (j : Nat), j < i → getBit (n / 2 + 1) j = false
⊢ (getBit (n + 2) zero = true ∧ ∀ (j : Nat), j < zero → getBit (n + 2) j = false) → getBit (n + 2) zero = true
no goals