x : Nat
| id (twice (id x))
x : Nat
| id x
x : Nat
| x
x : Nat
| id (twice x)
y : Nat
| (fun x => x + y = 0) = fun x => False
y : Nat
| fun x => x + y = 0
case h
y x : Nat
| y + x = 0
y : Nat
| (fun x => y + x = 0) = fun x => False
y : Nat
⊢ (fun x => y + x = 0) = fun x => False
convInConv.lean:15:8-15:12: warning: declaration uses 'sorry'