intro b
f : Bool → Bool → Bool
f_stable : f false false = false
m : Nat
hm : ¬m = 0
htf : f true false = true
⊢ ∀ (b : Bool), f b false = b
f : Bool → Bool → Bool
f_stable : f false false = false
m : Nat
hm : ¬m = 0
htf : f true false = true
b : Bool
⊢ f b false = b