rw [
  Nat.lsb_of_even heven,
  Nat.shiftLeft_getBit,
  decide_eq_false (p:=0≥1) (by decide),
  Bool.false_and,
]
n : Nat
heven : n % 2 = 0
⊢ getBit (Nat.lsb n) 0 = getBit n 0
n : Nat
heven : n % 2 = 0
⊢ false = getBit n 0