Logical reasoning PrepTest 109 · Section 1 · Question 11

Incorrect. The stimulus compares the number of people who consume caffeine and other substances, not the number of people addicted to them. Without a note as to what percentage of people who consume a given substance become addicted to it, this answer can't be supported.

Incorrect. First, the stimulus notes psychological symptoms only for caffeine during withdrawal, which doesn't support this broader statement about the effects of psychoactive substances generally. Also, the stimulus notes that "[s]ome" people face these symptoms so it's too much to say that this is "typical[]."

Incorrect. Caffeine is compared to "other" psychoactive substances establishing that caffeine is itself psychoactive. Therefore the stimulus discusses only psychoactive substances so this answer about non—psychoactive substances is out of scope.

Incorrect. This is established as true for caffeine for some people, not of all psychoactive substances for all people.

Correct. Argument or Facts:
Facts

Question Type:
Must Be True

Stimulus Summary:
Caffeine:
(1) Can be as addictive as other psychoactive drugs
(2) Some people go through withdrawal if they skip their morning coffee
(3) As many people consume it as consume any other psychoactive drug

Answer Anticipation:
The stimulus presents a few pieces of information about caffeine. It opens with a weak comparison ("can be as") between it and "other" psychoactive drugs (which establishes that caffeine is also a psychoactive drug). It then talks about what some people go through when they miss their daily dose which is a pretty weak statement. It then ends with a very strong statement—"as many people" consume caffeine as consume "any one" other psychoactive substance. This comparison allows us to say that for any other psychoactive drug as many or more people take caffeine—or on the flipside as many or fewer people take the other drug.

Any of these statements can lead to a correct answer but the first two are relatively weak so the last statement is the one most likely to support the correct answer as stronger statements have an "easier" time supporting an answer.

Answer Explanation:
The last line of the stimulus establishes that there are at least as many people who consume caffeine as consume any other addictive psychoactive substance. If alcohol falls into that category then as many people must consume caffeine as consume alcohol as this answer states.

Key Takeaway:
When the stimulus of a Must Be True question features stronger and weaker statements the stronger statements are more likely to be used in supporting the correct answer.