conv => lhs; rw [Nat.lsb_of_odd (n:=1) (by decide)]
i : Nat
⊢ getBit (Nat.lsb 1) i = true ↔ getBit 1 i = true ∧ ∀ (j : Nat), j < i → getBit 1 j = false
i : Nat
⊢ getBit 1 i = true ↔ getBit 1 i = true ∧ ∀ (j : Nat), j < i → getBit 1 j = false