8 lines
244 B
Text
8 lines
244 B
Text
(a, a)
|
|
d1 : true = true
|
|
def d1 : true = true :=
|
|
new_ax
|
|
(a, a)
|
|
1299.lean:13:8: error: invalid theorem 'd2', theorems should not depend on axioms introduced using tactics (solution: mark theorem as a definition)
|
|
theorem d2 : true = true :=
|
|
sorry
|