1. 1. Know the following definitions.
      • Argument (what constitutes a valid argument?)
      • Fallacy
      • Modus ponens
      • Modus tollens
   2. Do the following exercises from the textbook (Kohar).
      • 2.2.3 (a), (b), 2.2.4, 2.2.5, 2.2.6, 2.2.7, 2.2.8, 2.2.9, 2.2.12, 2.2.13, 2.2.14, 2.2.15, 2.2.16, 2.2.17, 2.2.19
      • 2.4.1, 2.4.2
      • 2.9.4 a) b) c), 2.9.5, 2.9.6, 2.9.7
   3. Using the rules of inference, prove that modus ponens is a valid argument; that is, show that .
   4. The following argument is called affirming the consequent. Is it valid?

(Premise)
(Premise)
(Conclusion)

1. 1. The following argument is called denying the antecedent. Is it valid?

(Premise)
(Premise)
(Premise)