In marketing their products

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsMust be True

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Stimulus

In marketing their products, drug companies often send gifts to physicians. According to a recent survey, most physicians believe that their own choices when prescribing drugs are not influenced by drug companies’ gifts. The same survey indicates that the physicians’ prescription choices are influenced by such gifts.

What this question is testing

Must be True

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

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The question

22.

If the survey results are accurate, which one of the following must

Answer choices

Supports a Premise3% picked this
Physicians who do not accept gifts from drug companies are less likely to prescribe unnecessary drugs than those
This supports the physicians who believe that most other physicians are influenced by such gifts.
3%
Out of Scope1% picked this
Most physicians believe that drug companies should adopt new guidelines that regulate their practices in
What physicians believe should be done about the practice of sending gifts to physicians is not discussed in the passage.
1%
Correct85% picked this
Some physicians are mistaken either about the degree to which they are influenced by gifts from drug companies or about the degree to
Why this is right
Either some physicians are wrong that they are not influenced by such gifts or some physicians are wrong that most physicians are influenced by such gifts. But it cannot be that both beliefs are true, otherwise a contradiction would ensue and some physicians who are not influenced by such gifts would be influenced by such gifts.
Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.
85%
Too Strong8% picked this
Some physicians who admit that their own choices when prescribing drugs are influenced by drug companies' gifts believe that other physicians' prescription choices are
The degree of influence for either belief is not discussed in the statements.
8%
Too Strong2% picked this
All physicians who admit that their own choices when prescribing drugs are influenced by drug companies' gifts believe that most other physicians' prescription choices
While it could be the case that all physicians who believe oneself to be influenced by gifts could believe that most others are influenced gifts, it could also be that some of these physicians do not believe that most other physicians are influenced by gifts. This is demonstrated in a possible counterexample below. Don’t Believe most believe most others are others are influenced influenced Total Believe oneself is 20 20 <50 influenced Don’t believe oneself is 40 20 >50 influenced Total >50 <50 100
2%

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