Bunuel
The greater the number of people who regularly use a product, the greater the number whose health is potentially at risk due to that product. More people regularly use household maintenance products such as cleaning agents and lawn chemicals than regularly use prescription medicines. Therefore, it is even more important for such household products to be carefully tested to ensure their safety than it is for prescription medicines to be so tested.
Which one of the following principles, if valid, most helps to justify drawing the conclusion in the argument above?
(A) Whether or not it is important for a given product to be carefully tested depends mainly on the number of people who regularly use that product.
(B) It is very important for any product that is regularly used by a large number of people to be carefully tested to ensure its safety.
(C) The more people whose health might be at risk from the regular use of a particular product, the more important it is for that product to be carefully tested to ensure its safety.
(D) If one type of medicine must be taken in more frequent doses than another type of medicine, it is more important for the former to be carefully tested than for the latter.
(E) It is generally more important for a medicine than it is for a nonmedical product to be carefully tested to ensure its safety unless more people’s health would be at risk from the nonmedical product than from the medicine.
EXPLANATION FROM Fox LSAT
This argument seems to ignore the difference between the
number of people exposed to risk and the
magnitude of the risk each person is exposed to. Yes, it’s true, many more people use Windex than use Oxycontin. So you could say that many more people are exposed to the risk of Windex than are exposed to the risk of Oxycontin. But does this mean that Windex is more dangerous than Oxycontin? Hell no. If you lock yourself in an airtight room and hose down the walls, floors, and ceiling with Windex nonstop for 12 hours, you’ll probably get a little dizzy/headachy. If you accidentally take too much Oxycontin, maybe you end up in a coma. If you accidentally take Oxycontin for a little too long, maybe you end up trying to knock over a truck stop pharmacy in Bakersfield to get your fix. The logic here is just stupid.
The question asks us to “justify” the conclusion of the argument. That means we need to switch teams. To strengthen the horrible logic of the argument, my fantasy premise would be something like, “The number of people exposed to a certain substance is the only determinant of how important it is to test the safety of that substance.” I’m not saying I actually believe that: I think it’s stupid. But if we were to accept it as truth (or if we could get a judge to believe it) then we’d prove our case. So that’s my prediction.
A) This is pretty good. It says the importance of testing is “mainly” dependent on the number of people who use the product. I’d like this answer better if it said “only” instead of “mainly” but it’s still pretty good.
B) If this is true, then it proves we should carefully test Windex, but doesn’t necessarily mean we shouldn’t test Oxycontin even more. So I don’t think this is as good as A.
C) Oh, this is even better than A. Answer A said “depends mainly” on the number of people, but didn’t go all the way and actually make it explicit that “more people means more testing.” Don’t assume this is obvious! Nothing is obvious. Answer C covers all the bases, so it’s better than A. It’s also better than our prediction, for this same reason. It’s our answer so far.
D) This is only about one medicine vs. another, which ignores the point of the argument. No way.
E) This would weaken the argument rather than strengthen it.
Our answer is C.