Which one of these are logically equivalent?
Code # 1 (Inverse): If I do not use MathFinder, I will not defeat Dr. Madness.
Code # 2 (Converse): If I defeated Dr. Madness, I used Mathfinder.
Code # 3 (Contrapositive): If I did not defeat Dr. Madness, then I did not use Mathfinder.

Question

Which one of these are logically equivalent?
Code # 1 (Inverse): If I do not use MathFinder, I will not defeat Dr. Madness.
Code # 2 (Converse): If I defeated Dr. Madness, I used Mathfinder.
Code # 3 (Contrapositive):  If I did not defeat Dr. Madness, then I did not use Mathfinder.

anonymous · Answer

Im thiking the first one is not because that isn't the only way you can defeat him