SSG_Chapter9

# What has failed to restore narwhal populations off

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what has failed to restore narwhal populations off the BC coast will fail to restore narwhal populations in Canada’s North 5. Considering the scheme of polling and the premises it requires, the weakest point in the argument is ________. a) the first premise (in which S is a sample of X s) b) the second premise (in which Proportion 1 of X s in S are Y ) c) the conclusion (in which Proportion 2 of X s are Y ) 6. Considering the weakest point in the argument, the most effective way to argue against it would be to ________. a) describe the features of the sample which make it unrepresentative b) describe the features of the sample which bias it 7. The conclusion of the argument involving general causal reasoning is that ________. a) most scientists believe the decline in the narwhal population in Canada’s North is due to a permanent and serious decline in their food stocks b) eliminating the presence of fishing vessels in the area causes fish populations to increase slowly, but steadily c) what has failed to restore narwhal populations off the BC coast will fail to restore narwhal populations in Canada’s North 8. Considering the general causal reasoning involved and the premises it requires, the weakest point in the argument is ________. a) the first premise (in which X is correlated with Y ) b) the second premise (in which the correlation between X and Y is not due to chance)

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Good Reasoning Matters! A Constructive Approach to Critical Thinking , Fifth Edition © Oxford University Press Canada, 2012 c) the third premise (in which the correlation between X and Y is not due to some mutual cause Z ) d) the fourth premise (in which Y is not the cause of X ) 9. Considering the weakest point in the argument, the most effective way to argue against it would be to ________. a) show that the correlation between X and Y is due to chance b) show that the correlation between X and Y could be due to chance Carefully read the passage. It includes two of the three of the schemes discussed in this chapter. Determine where and how each is employed, then answer the following questions. It is strongly recommended that you at least dress the argument. You may also want to draw an argument diagram. Passage 13 There’s no way to be sure how many insects are ingested accidentally while sleeping, eating, or being otherwise distracted from what is going into our mouths. Casual experimentation has certainly shown me that most of my friends can cheerfully eat spiders, flies and even centipedes without noticing, as long as they are introduced into their food carefully. As this result probably generalizes, it seems safe to conclude that not paying attention to what you’re eating could cause you to eat a bug. 1. The scheme which is not contained in this passage is ________. a) generalization b) polling c) general causal reasoning 2. The conclusion of the argument by generalization is that ________. a) not paying attention to what you’re eating could cause you to eat a bug b) carefully introducing bugs into someone’s food will cause them to eat them c) there’s no way to be sure how many insects are ingested accidentally while distracted from what is going into our mouths 3.
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• Fall '09
• JURKOWSKI
• Logic, Districts of Vienna, Fifth Edition, Oxford University Press Canada, general causal reasoning

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