Set: pp::colors
Set: pp::unicode
Assumed: a
Assumed: b
Assumed: f
Assumed: fNat
(∀ x : ℕ, x > 0) ∧ (∀ x : Bool, f x)
congr1 (congr2 and (allext (λ x : ℕ, fNat x))) (∀ x : Bool, f x)