PT115.S2.Q18

PrepTest 115 - Section 2 - Question 18

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Support All historians are able to spot trends. ███ ██████ ████ ██ ████ ██████ ██ ████ ██ ███████████ ███ ███████████ ████ ███ ██████████████ ████ ██████ ███ ███ ███████████ ███ ███████████ ████ ███ █████████████ ██ █ ██████████

Method of Reasoning

As premises, this argument sets up a chain of conditional claims: historians are able to spot trends; people who can spot trends can distinguish the significant from the insignificant. Based on this chain, the stimulus concludes that the ability to distinguish the significant from the insignificant is a sufficient condition for determining that one is a historian.

Identify and Describe Flaw

This argument commits the cookie-cutter flaw of confusing necessary and sufficient conditions. The conditional chain provided in the premises would allow us to conclude that being a historian is a sufficient condition for being able to distinguish the significant from the insignificant, but the argument concludes the reverse, which is unsupported.

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18.

The flawed reasoning in which ███ ██ ███ █████████ █████████ ████ ███████ █████████ ████ ██ ███ ████████ ██████

a

All expressions used ███ █████████ ██████ ███ ███████████ ████ ██ ██████ ███ ███████ ██ ██████ ███ ███████████ ████ ███ █████████ ███████ ██ ███ ██████████ ████ ██ █████ ██ █ ██████ ██ ███████

b

Political systems whose ████ █████████ ██ ███████ ████████████ ███ █████ ██ █████████████ ████████████ █████ ██ █████ █████████ ████ █████████ ███████ ███ ███ ██ █████████ ████ █ ████████ ██ ████ ████ █████ █████████

c

Animals that possess █████ ██ ███████ ███ ████ ███ ██ ██████ ████ ███ ███ ████████████ ███████ ██ █████ ███████ ██ ████████ █████ ████ ███ █████ ██ █████ ████ ███ █████████ ██ ██████████ ████ ███ ██████ ████ ██████ ████ ███████ ██ ███ ███ ███████ ██ ███ █ █████████

d

No one without █ ████ ██████ ██ ███████████ ███ ██ █ █████ █████████ ██ ███████████ ████████ ███ ██ ████ ████ ████ ████ ██████ ██ ████████████ █████ ████ ████ ██████ █████ ██████████

e

People living in ████ ███ ██████████ █████████ ████ ███████ ████ ███ ██████████ ██ █████ ██ ████ ██ ██ █████████ █████ ███ ██ █████████ ████ ██ █ ███████ ██ ████ ███████ ████ ██████ ██████ ██ ████ ███ ██████████ █████████ ███ █████ ██ ████████ █████

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