Unit 1 2011 Answers - UNIT 1: REASON AND ARGUMENT Answers...

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Answers to Logic Unit 1: Introduction 1 ©2011 Niko Scharer UNIT 1: REASON AND ARGUMENT Answers to exercises 1.4 E 1 Some students will undoubtedly pass this course. Hence it is clear that some students in this class will do the exercises, since nobody passes who doesn’t do at least some of the exercises. Some students will pass this course. Nobody passes who doesn’t do at least some of the exercises. _________________________________________________ Some students in this class will do the exercises. “Hence” indicates the conclusion & “since” indicates a premise. 1.4 E 2 Anybody who smokes is irrational. Any rational person knows that smoking can kill you, and engaging in an activity that can kill you is suicide! No rational person commits suicide. Any rational person knows that smoking can kill you. Engaging in an activity that can kill you is suicide. No rational person commits suicide. ______________________________________________ Anybody who smokes is irrational. This one has no premise or conclusion indicators. But the three premises taken together supports the conclusion, whereas none of the other statements are supported by each other (or by the conclusion.) 1.4 E 3 If I study, I won’t have much free time in which to party. On the other hand, if I don’t study, my parents will cut off my funds. Without parental funds I’m not going to be going out much at all. So it looks like there won’t be any partying for me. If I study then I won’t have much free time in which to party. If I don’t study then my parents will cut off my funds. Without parental funds, I won’t be going out much at all. __________________________________________________ I won’t be partying. “So” indicates the conclusion. “On the other hand” indicates a premise. The argument depends on an unstated or implicit premise: “Either I will study or I won’t study.” Either way, the speaker won’t be partying!
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Answers to Logic Unit 1: Introduction 2 ©2011 Niko Scharer 1.4 E 4 At some point in the far distant past, the universe came into existence. But nothing can come from nothing; nothing can come into existence unless there is something to create it. Accordingly, there must be a God – a first creator, outside time. This follows from the fact that there must exist, outside the universe, some being that caused the universe to exist. Such a being must not have been created at all, unless there was some greater being that caused it that creator to exist, and hence this being would be the first creator. The universe came into existence at some point in the past. Nothing can come into existence unless there is something to create it. The creator of the universe must have existed outside the universe and prior to it.
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Unit 1 2011 Answers - UNIT 1: REASON AND ARGUMENT Answers...

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