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13 Oct 2021, 02:30
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
70% (02:19) correct
30%
(02:28)
wrong
based on 719
sessions
History
Date
Time
Result
Not Attempted Yet
Cholesterol, which is a known factor in coronary heart disease and stroke, needs a carrier, known as a lipoprotein, to transport it through the bloodstream. Low-density lipoproteins (LDLs) increase the risk of coronary heart disease and stroke, but we can tentatively conclude that high-density lipoproteins (HDLs) help prevent coronary heart disease and stroke. First, aerobic exercise increases one’s level of HDLs. Second, HDL levels are higher in women than in men. And both aerobic exercise and being female are positively correlated with lower risk of coronary heart disease and stroke.
Each of the following, if true, strengthens the argument EXCEPT:
(A) HDLs, unlike LDLs, help the body excrete cholesterol.
(B) Persons who are overweight tend to have a higher risk of early death due to coronary heart disease and stroke, and tend to have low levels of HDLs.
(C) HDLs are less easily removed from the bloodstream than are LDLs.
(D) A high level of HDLs mitigates the increased health risks associated with LDLs.
(E) Men whose level of HDLs is equal to the average level for women have been found to have a lower risk of coronary heart disease and stroke than that of most men.
Each of the following, if true, strengthens the argument EXCEPT:
(A) HDLs, unlike LDLs, help the body excrete cholesterol.
(B) Persons who are overweight tend to have a higher risk of early death due to coronary heart disease and stroke, and tend to have low levels of HDLs.
(C) HDLs are less easily removed from the bloodstream than are LDLs.
(D) A high level of HDLs mitigates the increased health risks associated with LDLs.
(E) Men whose level of HDLs is equal to the average level for women have been found to have a lower risk of coronary heart disease and stroke than that of most men.
16 Oct 2021, 02:30
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Bunuel
EXPLANATION FROM Fox LSAT
I have big problems with the logic here. (I bet you’re shocked.) The conclusion of the argument is, “We can tentatively conclude that HDLs help prevent coronary heart disease and stroke.” But the evidence is shaky. Let’s start with the link between HDLs and aerobic exercise. The logic goes like, “Aerobic exercise increases your HDLs, and aerobic exercise is correlated with a lower risk of heart disease and stroke, therefore HDLs help prevent heart disease and stroke.” Huh? What if
I had said this instead? “Aerobic exercise increases your sexiness, and aerobic exercise is correlated with a lower risk of heart disease and stroke, therefore sexiness helps prevent heart disease and stroke.” Does that make any sense? Nope, and it’s the same exact logic used by the author.
The same problem exists with the “being female” rationale for why HDLs supposedly lower your risk of heart disease and stroke. All we have here is correlation, and you must always remember that correlation does not prove causation.
The question asks us to identify the single correct answer that does not strengthen the argument. So there are four potential strengtheners and one correct answer that is either irrelevant or actually weakens the argument. Let’s see.
A) This would make the argument start to make some sense, because it proposes a mechanism whereby HDLs could help reduce heart disease and stroke. We’re told that cholesterol is a known factor in coronary heart disease and stroke, so if HDLs help get rid of cholesterol then that’s a good thing. This is causation, rather than mere correlation. This is a strengthener, so it is not our answer.
B) This is an additional factor showing a correlation between HDLs and heart disease and stroke. We already had two factors indicating the correlation, and I’m not sure a third really helps all that much. A fairly common incorrect answer on a Strengthen question is one that repeats a premise that’s already in evidence. Since we already knew the variables were correlated, I don’t see how this is a strengthener—which would make it a good answer for this “strengthen… EXCEPT” question. I’m hoping C through E are all strengtheners like A so that I can confidently choose B.
C) Oh man. This seems completely irrelevant to me. At least B provided an additional correlative factor. What does “removed from the bloodstream” have to do with anything? I don’t even see that concept in the argument anywhere. I like this answer best so far, because it’s the most irrelevant. At least B would reinforce the argument. This one doesn’t do ****.
D) This says that HDLs help lower your health risks, which is a causal relationship. This is a good strengthener, so it’s not our answer.
E) This is another data point in favor of the correlation between HDLs and good health. It’s not a wonderful strengthener, but at least it’s relevant.
C, being entirely irrelevant, must be our answer.
General Discussion
23 Oct 2025, 01:07
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