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Unformatted text preview: CS 245 Winter 2009 Solution Set for Lecture 2 Nissanke Ch. 2 and 3 Exercise 2.1 (p. 12) 1. No, it is a command. 2. No, it is an exclamation. 3. Yes, even though it is false. 4. Yes. 5. Yes. 6. No, it is a question. 7. Yes. 8. Yes, it is a true fact. 9. Yes, even though it is false. Exercise 2.2 (p. 13) 1. In text. 2. In text. 3. In text. 4. A pen is to write with , (hidden and ) a glass is to drink out of and an arrow is to attack someone from a distance . Thus , the purpose of an object determines its shape except the purpose of an object made for art does not determine its shape or the purpose of an object made for pleasure does not determine its shape . 1 5. No matter how high you jump you cannot reach the moon except by flying in a spacecraft you can reach the moon . 6. if seals fall into the water then they almost always drown unless they are attached to floats . Exercise 2.3 (p. 16) 1. p ∧ q ⇒ ¬ r ∧¬ s if the thief is young and the thief is hanged , then the thief will not...
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This note was uploaded on 10/23/2009 for the course CS 245 taught by Professor A during the Spring '08 term at Waterloo.
- Spring '08