Question #1801

Why doesn't answer A work?

Started by yuetngan · started 2020-07-21 15:39 · last activity 2020-07-21 22:58 · 2 replies

Why doesn't answer A work? I see how B works but A also works. Which one to choose?

Replies

  1. yuetngan · 2020-07-21 16:01

    Nvm, I forgot the contrapositive works.

  2. shunhe · 2020-07-21 22:58

    Glad you figured it out!

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