Question

Which ones 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

Answer 1

code# 2

Answer 2

what is this about?

Answer 3

math proofs

Answer 4

code #1 & #2

Answer 5

why not 3?

Answer 6

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.
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These two are logically equivalent because one if the contrapositive of the other.

---------> I'm wondering if something were left out of the question such as "Which ONE of the following is logically equivalent to the given implication "If I use MathFinder, then I defeated Dr. Madness. IF that is the case, then that implication is logically equivalent to its contrapositive: Code # 3 (Contrapositive): If I did not defeat Dr. Madness, then I did not use Mathfinder.