3.1 What Is A Deductive Argument?
Quiz yourself on the terms and concepts you learned in this section!
Questions and Answers
- 1.
A valid argument is one with the following property:if the premises are all true, the conclusion cannot be false.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True, by definition.Rate this question:
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- 2.
A deductive argument is an argument that is intended to be valid.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True.Rate this question:
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- 3.
An argument can be both invalid and deductive.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
True. This can be a tricky one to get.
If the argument is intended to be valid then it's deductive. But it may fail to be valid. Maybe the arguer mistakenly thinks an invalid argument form is really valid. So we'd call this a failed deductive argument, but it's still a deductive argument.Rate this question:
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- 4.
“Look, all spiders are poisonous, right? You got bit by a spider, so you’ve definitely been poisoned!”
- A.
A valid deductive argument
- B.
An invalid deductive argument
Correct Answer
A. A valid deductive argumentExplanation
This is valid, and the "definitely" indicates that it was intended to be valid as well, so it's also deductive.Rate this question:
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- 5.
“Look, all spiders are poisonous, right? You’ve been poisoned, so you’ve definitely been bit by a spider!”
- A.
A valid deductive argument
- B.
An invalid deductive argument
Correct Answer
B. An invalid deductive argumentExplanation
This is invalid. That first premise doesn't say that ONLY spiders are poisonous, so in this world things other than spiders can poison you. But it's still deductive, since it's intended to be valid.Rate this question:
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Mar 22, 2023Quiz Edited by
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Aug 25, 2012Quiz Created by
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