Brook Miscoski wrote: ↑Fri Oct 19, 2018 5:50 pm
Boston,
Reading through the stimulus, my reaction was that being bold might get you eaten (prematurely). That would have been a more fun answer. Alas, it was not to be.
Here is the short answer, followed by a longer answer in case I misinterpreted you.
If you got the correct negation of (C) as "No fish die from being too timid in foraging for food" but still believed this did not defeat the argument, please take a look at the conclusion. If food is not a factor in survival, the argument that being more adventurous in trying new food is helpful to survival has been disproved.
If that isn't enough, see the following:
(C) was still the stand-out selectable choice.
(A) About fish surviving, not economics...off topic.
(B) About what is best preparation for any environment, so the argument doesn't assume that environment is irrelevant. Contrary to stimulus, and wrong.
(C) survives--discussion to follow
(D) survives (barely)--discussion to follow
(E) Stimulus is about likelihood, not about what "always" happens. Among other reasons, eliminate this.
The reason I say that (D) barely survives is that the stimulus is just about willingness to try new food, not about having a varied diet. So I eliminated it, personally, right away. Because it could survive, I kept it for the negation test.
Negations follow:
(C) No fish die from being too timid in foraging for food.
(D) Fish don't need multiple types of food to survive.
In negation, (C) would destroy the argument because it indicates that a lack of boldness is unimportant to survival. (D) doesn't hurt the argument, which makes claims about finding food, not about having access to many different types of food.
Reading over your question, I think that what happened is that your negation was off. The logical negation of "some" is "none." If you tried to negate a different part of (C), the problem is that with "some" qualifying the whole of (C), you aren't achieving logical negation. So the target, and the only target, for the negation technique is to change the "some" to "none."
So if I'm to understand this correctly, the reason answer choice D is incorrect lies in the distinction between "new types of food" (stimulus), and "different types of food" (answer choice D)? If answer choice D had instead read, "Hatchery-raised fish that are released into the wild need to try new types of food to survive," would it be the correct answer?
Also for what it's worth, I eliminated answer choice C because I got spooked by the phrase "too timid." I suppose "too timid" and "not bold" are indeed synonymous, but I feel like the LSAT fosters a level of paranoia that makes me doubt my ability to detect subtle changes in wording (i.e. the above scenario!!!). That wasn't a question, just a rant
Thanks!