1301.lean:2:23-2:26: error: tactic 'tacticTac' has not been implemented
a : True
1301.lean:5:32-5:35: error: tactic 'tacticTac' has not been implemented
1301.lean:5:40-5:43: error: tactic 'tacticTac' has not been implemented
a' : True ∧ True
1301.lean:9:25-9:29: error: elaboration function for 'termTerm' has not been implemented
  term
def b : Nat → Nat :=
sorry