10.1 Quiz Critical Thinking by Example


1. Background: The following is from an excerpt from a CBC editorial by Jim Reed.
“Five years ago, the entire world supported the overthrow of the Taliban government in Afghanistan. But after removing that repressive regime, the Americans, who led the effort, went off to do business in Iraq and the Taliban were allowed to regroup.” (http://www.cbc.ca/news/viewpoint/vp_reed/20060912.html. Downloaded September 24, 2006).
This passage is best understood as



a) an argument.
b) an explanation.
c) neither an argument nor an explanation.
2. “The sun sets every night because it too needs its sleep.”
This passage is best understood as


a) an argument.
b) an explanation.
c) neither an argument nor an explanation.
3. “(i) If you leave the window open tonight we will freeze to death. (ii) And, I am sure that you don’t want to freeze to death.” Which of the following best describes the relation between (i) and (ii)?

a) (i) is an explicandum and (ii) an explanans.
b) (ii) is an explicandum and (i) is an explanans.
c) (ii) is a conclusion and (i) is a premise.
d) (ii) is a conclusion and (i) is a premise.
e) None of the above.
4. 1. “All humans are mortal, and Socrates is a human, so Socrates is mortal.” This passage contains

a) 1 proposition.
b) 2 propositions.
c) 3 propositions
d) 4 propositions.
e) 5 propositions.
5. “We need some compromise on Capitol Hill. Either there is a compromise, or the government will run out of money, and nobody wants the government to run out of money.” This passage contains

a) 1 proposition.
b) 2 propositions.
c) 3 propositions.
d) 4 propositions.
e) 5 propositions.
6. “[1] NASA is getting ready to launch its latest probe, named “Curiosity”, to Mars. [2] Some people say that we should not be sending more probes to Mars [3] because they are expensive, [4] and we have a large federal deficit. [5] However, Curiosity is being sent to look for signs of life. [6] The discovery of life on Mars would be the scientific discovery of the century, [7] so it is worth the cost. [8] It is true that previous probes have failed to find life, [9] but Curiosity is far more advanced in its instrumentation compared with our earlier efforts.” Proposition [2] is best described as

a) a premise in support of the author’s argument.
b) a conclusion of the author’s argument.
c) a counterconsideration.
d) a premise in support of a counterargument to the author’s argument.
e) a conclusion of a counterargument to the author’s argument.
7. “[1] NASA is getting ready to launch its latest probe, named “Curiosity”, to Mars. [2] Some people say that we should not be sending more probes to Mars [3] because they are expensive, [4] and we have a large federal deficit. [5] However, Curiosity is being sent to look for signs of life. [6] The discovery of life on Mars would be the scientific discovery of the century, [7] so it is worth the cost. [8] It is true that previous probes have failed to find life, [9] but Curiosity is far more advanced in its instrumentation compared with our earlier efforts.” Proposition [3] is best described as

a) a premise in support of the author’s argument.
b) a conclusion of the author’s argument.
c) a counterconsideration.
d) a premise in support of a counterargument to the author’s argument.
e) a conclusion of a counterargument to the author’s argument.
8. “[1] NASA is getting ready to launch its latest probe, named “Curiosity”, to Mars. [2] Some people say that we should not be sending more probes to Mars [3] because they are expensive, [4] and we have a large federal deficit. [5] However, Curiosity is being sent to look for signs of life. [6] The discovery of life on Mars would be the scientific discovery of the century, [7] so it is worth the cost. [8] It is true that previous probes have failed to find life, [9] but Curiosity is far more advanced in its instrumentation compared with our earlier efforts.” Proposition [4] is best described as

a) a premise in support of the author’s argument.
b) a conclusion of the author’s argument.
c) a counterconsideration.
d) a premise in support of a counterargument to the author’s argument.
e) a conclusion of a counterargument to the author’s argument.
9. “[1] NASA is getting ready to launch its latest probe, named “Curiosity”, to Mars. [2] Some people say that we should not be sending more probes to Mars [3] because they are expensive, [4] and we have a large federal deficit. [5] However, Curiosity is being sent to look for signs of life. [6] The discovery of life on Mars would be the scientific discovery of the century, [7] so it is worth the cost. [8] It is true that previous probes have failed to find life, [9] but Curiosity is far more advanced in its instrumentation compared with our earlier efforts.” Proposition [5] is best described as

a) a premise in support of the author’s argument.
b) a conclusion of the author’s argument.
c) a counterconsideration.
d) a premise in support of a counterargument to the author’s argument.
e) a conclusion of a counterargument to the author’s argument.
10. “[1] NASA is getting ready to launch its latest probe, named “Curiosity”, to Mars. [2] Some people say that we should not be sending more probes to Mars [3] because they are expensive, [4] and we have a large federal deficit. [5] However, Curiosity is being sent to look for signs of life. [6] The discovery of life on Mars would be the scientific discovery of the century, [7] so it is worth the cost. [8] It is true that previous probes have failed to find life, [9] but Curiosity is far more advanced in its instrumentation compared with our earlier efforts.” Proposition [6] is best described as

a) a premise in support of the author’s argument.
b) a conclusion of the author’s argument.
c) a counterconsideration.
d) a premise in support of a counterargument to the author’s argument.
e) a conclusion of a counterargument to the author’s argument.
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