- Tue Jul 31, 2018 1:26 pm
This is a tough one, chian9010, but it may help to note that the stem here is a "Most Strongly Supported" stem, which is sort of like the weaker sibling to a full-force Must Be True question. In a true Must Be True scenario, the correct answer is absolutely and completely proven by the facts in the stimulus. In a Most Strongly Supported variant, however, the correct answer is supported by the facts but doesn't absolutely have to be true. Think of it like a Strengthen question in reverse, where the information in the stimulus strengthens, but doesn't necessarily prove, one of the answer choices, while the other answers are completely unsupported by the stimulus.
Answer choice D is unsupported because the stimulus gives us no information at all about the relative intensity of various allergic reactions. Some people have reactions, others do not, but among those that are allergic it could be true that all those reactions are of equal intensity. In the real world that seems unlikely, because we know that some people will have mild reactions - maybe a few sneezes and a little itching around the eyes - while others will have full on anaphylactic shock and stop breathing. This stimulus, though, doesn't give us any of that information, and we shouldn't bring in that outside info to our answer choices. Do the facts of the stimulus tell us anything about the intensity of the reactions? Nope, only that some folks will react and others will not.
Answer choice C does get some support from the stimulus. Based on the claims that some cats will cause reactions in some people who are allergic and not in others who are allergic, and that the proteins that cause those reactions are different from one person to the next, it seems to be a reasonable inference that the cats have variances in which proteins they are spewing around the environment. Cat A is spreading protein X, which some people are allergic to, and Cat B is spreading protein Y, which different people are allergic to.
Now if we dig a little deeper, we are going to find out that this answer is even stronger than it first appeared, and in fact it Must Be True. Imagine for a moment, that it was not. What if all cats spread the exact same proteins as each other. They are all spreading both X and Y, in my example. Now, if you are allergic to cats, you will be allergic to ALL cats, right? If you are allergic to X, or if you are allergic to Y, you will be allergic to all the little furry monsters because they are all spreading both. In that case, it couldn't be true that some allergic people would react to one cat and not to another. A person allergic to any cat would be allergic to all cats, and would react to them all!
Be sure to base your answers on any Must Be True question, including the Most Strongly Supported variant, solely on the facts presented in the stimulus, with no outside help. Beware of any answer that brings up information not mentioned in the stimulus, as those are mostly trap answers! They can be correct only if the new information is either not necessary for the answer to work, or if they are not really new but are covered by some larger, umbrella concept in the stimulus. A common example of the latter is where the stimulus tells you something about "all animals" and the correct answer is about "humans" (because we are animals, and therefore covered by that umbrella of "all animals").
Keep at it, good luck!
Adam M. Tyson
PowerScore LSAT, GRE, ACT and SAT Instructor
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