PT124.S2.Q20 > Question

SECTION 1 · lr

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SECTION 4 · rc

PASSAGE 1

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PASSAGE 2

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PASSAGE 3

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PASSAGE 4

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The author concludes that there are some days when both of the following occur: (1) the wind blows into Hillview from the east, and (2) the smog in Hillview reaches unsafe levels. This is based on the fact that there are some hot days on which the smog in Hillview reaches unsafe levels, and that there are some hot days on which the wind blows into Hillview from the east.

The author assumes that some of the hot days on which the smog reaches unsafe levels are the same hot days on which the wind blows in from the east. This overlooks the possibility that the hot days on which the smog reaches unsafe levels are simply different days from the hot days on which the wind blows in the from east.

If “Some A are B” and “Some A are C,” we cannot conclude “Some B are C.” This is because B and C might not overlap within the set of A.

The author does not assume that anything “necessarily accompanies” unsafe levels of smog. The author believes that some days with unsafe smog levels are days on days with the east wind, but that doesn’t imply unsafe smog is always accompanied by east wind.

The author fails to recognize that although the set of “hot days” has some days in common with the “unsafe smog days” and some in common with “east wind days,” the “unsafe smog days” and “east wind days” don’t have to have any days in common.

The word “unsafe” does not take on different meanings in this argument. It means “not safe.”

(D) describes circular reasoning, which isn’t what happens here. Accepting the premises does not require that we already accept there are some days with both unsafe smog and east wind.

The argument does not assert any causal relationships. The claim that there are some days that have both the east wind and unsafe smog does not assert that the east wind causes smog to be blown in or that the smog causes the east wind.

PrepTest 124 - Section 2 - Question 20

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