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(See the complete passage discussion here: lsat/viewtopic.php?t=14270)
SR, Weaken. The correct answer choice is (A)
This question requires you to find the answer choice that would weaken the author’s argument in the
last two paragraphs, where the author asserts that the notion of clinical equipoise should be adopted,
in part because the absence of consensus among experts makes clinical equipoise possible.
Answer choice (A): This is the correct answer choice. The author’s argument is that lack of
consensus makes clinical equipoise practicable, because participants can have a preference but
recognize that experts disagree. If, as this choice provides, most comparative clinical trials seek to
confirm the preferability of a treatment that is considered the best by a consensus of doctors, the
author’s point no longer holds.
Answer choice (B): This choice is irrelevant to the argument presented by the author, so this choice
should be ruled out of contention.
Answer choice (C): The argument presented in the last two paragraphs of the passage deals neither
with the number of comparative trials nor the level of ethical oversight, so this is not the correct
response to this Weaken question.
Answer choice (D): The author’s argument has nothing to do with which of these two groups has a
stronger preference for a standard of theoretical equipoise.
Answer choice (E): This choice provides that researchers who start a trial with no preference rarely
develop a strong preference subsequently. This does not weaken the author’s argument, though, as
this choice does not suggest that such completely ambivalent researchers are commonplace.