1 Fundamentals of Mathematics
p: She is beautiful. q:She is happy. Then (∼p)⇒(∼q), means
1) If she is beautiful, then she is not happy.
2) If she is not beautiful, then she is happy.
3) If she is not beautiful, then she is not happy.
4) If she is not happy, then she is not beautiful.
It is expanded to she is not beautiful implies she is not happy.
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