Try It Now

Work these exercises to see how well you understand this material.

Exercises

  1. Write the following in symbolic notation and determine whether it is a tautology: "If I study then I will learn. I will not learn. Therefore, I do not study".

  2. Describe, in general, how duality can be applied to implications if we introduce the relation ⇐, read "is implied by". We define this relation by (p ⇐ q) ⇔ (q ⇒ p).

 

Source: Al Doerr and Ken Levasseur, http://faculty.uml.edu/klevasseur/ads-latex/ads.pdf
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