Critical Thinking 9e, Chapter 4 Instructor's Manual

Critical Thinking - Chapter 4 Credibility Answers to Text Exercises Exercise 4-5 Something like number 9 is probably true given the huge almost

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Chapter 4 Credibility Answers to Text Exercises Exercise 4-5 ▲ Something like number 9 is probably true, given the huge, almost unimaginable difference in wealth between the richest and the poorest people on the planet, but we have no idea what the actual numbers are. We’ve seen number 12 going around the Web, but we don’t know whether there’s anything to it and we’re not interested in conducting the appropriate experiments. We think the rest of these don’t have much of a chance (although there are conspiracy theorists who seem to believe number 10). Exercise 4-8 ▲1. In terms of expertise, we’d list (d), (c), and (b) first. Given what we’ve got to go on, we wouldn’t assign expert status to either (a) or (e). We’d list all entries as likely to be fairly unbiased except for (a), which we would expect to be very biased. 2. If the friend’s interests and needs are similar to ours and we trust her judgment, then we like (b) best. Source (c) will certainly be biased, and (a) might be. Expertise among writers of newspaper columns varies a lot, as does level of bias; at best they’re writing for a mass audience. Source (e) brings up many of the same problems, plus the possibility of advertising pressure. Magazine reviews, however, usually go into more detail and are more sophisticated than those generally found in newspapers; they are therefore probably more valuable sources for people who are moderately knowledgeable. ▲3. Expertise: (b) first, then (a), then (c) and (d) about equal, and (e) last. We’d figure that (b) is
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This note was uploaded on 09/08/2011 for the course PHIL 110 taught by Professor Kay during the Spring '07 term at S.F. State.

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Critical Thinking - Chapter 4 Credibility Answers to Text Exercises Exercise 4-5 Something like number 9 is probably true given the huge almost

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