Set: pp::colors
  Set: pp::unicode
  Assumed: p
λ (a b c : Bool)
  (p : ℕ → ℕ → Bool)
  (n m : ℕ)
  (H : a → b → (∀ (x y : ℕ), c → p (x + n) (x + m)))
  (Ha : a)
  (Hb : b)
  (Hc : c),
  H Ha Hb 0 1 Hc :
    ∀ (a b c : Bool) (p : ℕ → ℕ → Bool) (n m : ℕ),
      (a → b → (∀ (x y : ℕ), c → p (x + n) (x + m))) → a → b → c → p (0 + n) (0 + m)