PrepTest 85, Section 3, Question 13
A new screening test has been developed for syndrome Q. Research has shown that the test yields a positive for syndrome Q whenever the person tested has that syndrome. So, since Justine shows positive on the test, she must have syndrome Q.
A new screening test has been developed for syndrome Q. Research has shown that the test yields a positive for syndrome Q whenever the person tested has that syndrome. So, since Justine shows positive on the test, she must have syndrome Q.
A new screening test has been developed for syndrome Q. Research has shown that the test yields a positive for syndrome Q whenever the person tested has that syndrome. So, since Justine shows positive on the test, she must have syndrome Q.
A new screening test has been developed for syndrome Q. Research has shown that the test yields a positive for syndrome Q whenever the person tested has that syndrome. So, since Justine shows positive on the test, she must have syndrome Q.
Which one of the following most accurately describes a flaw in the reasoning in the argument?
It confuses the claim that a subject will test positive when the syndrome is present with the claim that any subject who tests positive has the syndrome.
It makes a general claim regarding the accuracy of the test for syndrome Q without providing adequate scientific justification for that claim.
It fails to adequately distinguish between a person's not having syndrome Q and that person's not testing positive for syndrome Q.
It confuses a claim about the accuracy of a test for syndrome Q in an arbitrary group of individuals with a similar claim about the accuracy of the test for a single individual.
It confuses the test's having no reliable results for the presence of syndrome Q with its having no reliable results for the absence of syndrome Q.
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