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Not q therefore not p if and only if p then q not p

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Not Q. Therefore, not P. If and only if P, then Q. Not P. Therefore, not Q. If P, then Q. Not P. Therefore, not Q. 5 points Question 16 1. The syllogism itself, not the premises, can be _____. Answer - A
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valid. true. false. all of the above. 5 points Question 17 1. A syllogism in which one of the premises is missing is called a(n) _________________. Answer - B soft deductive argument. analogical argument. sentential argument. enthymeme. 5 points Question 18 1. Complete the following syllogism: All X are Y; Some Z are X; Therefore, ______________. Answer - A some Z are Y. some X are Z. all X are Z. all Z are Y. 5 points Question 19 1. Which one of the following syllogisms is invalid? Answer - C No X are Y. Some Z are X. Therefore, some Z are not Y. Some X are Z. All X are Y. Therefore, some Y are Z.
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Some X are Y. Some Z are X. Therefore, some Z are Y. Some X are not Z. All X are Y. Therefore, some Y are not Z. 5 points Question 20 1. In a valid syllogism, if the first two premises are true, then ______________. Answer - D the conclusion must be true. the conclusion must be false. the conclusion could be either true or false. the conclusion must be valid. Reference web.cn.edu/kwheeler/documents/ Syllogisms .pdf
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