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Mathematics 8 Online
OpenStudy (anonymous):

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

OpenStudy (anonymous):

code# 2

OpenStudy (anonymous):

what is this about?

OpenStudy (anonymous):

math proofs

OpenStudy (anonymous):

code #1 & #2

OpenStudy (anonymous):

why not 3?

Directrix (directrix):

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. ---- 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.

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