Let me try.

The stimulus already established that children in large families generally have fewer allergies than children in small families do. (A) is sort of a reiteration of this, because we already know that large families have fewer children with allergies. (A) is like saying oh, in North America and Asia we confirmed that large families have more kids with allergies.

What we are trying to do is to strengthen the researchers' hypothesis. There could be other hypothesis--for example, larger families tend to have genetically healthier parents than smaller families and the genes are passed on. We need to say that the researcher's hypothesis is more likely over that other possible explanations.

Question 19 is crazy. I don't know how you got it that easy. The sentence above, and the following word "similarly" kind of sets you up to understand the sentence as "if it is not chess, the superior chess players don't have good memory." And the answer choice (A) is waiting for you to pick it.

After watching the video, I realized that the question is asking for what the passage specifically says, not what you can infer from it. If it was inference question, (A) could've been a great right answer, isn't it?

After all, I am amazed how you can get this kind of question that easy, J.Y.

Truly agree. After doing several very recent preps, I began to realize that LSAT makers now are doing best they can to avoid repeating previous question patterns and surprise us with nontraditional ones.

Thanks for your detailed answer, Christian!

I think this question kind of deviates from PSA that we've encountered before. It almost feels like Necessary assumption question. The correct answer should be something like "if absence of something has potential to mislead future archaeologists, then it should be left there in the original place." And answer choice (A) does not do that. So eventually I got this question right by elimination, but I felt very unsure of my answer. This video explanation does not touch on that. Can any one explain better?

Can a clause following 'if' could be a premise? I took the whole thing (Thus, Ms. Sandstrom should pay for this damage if, as the Mendels claim, she could have reasonably expected that the column would lead people to damage the Mendel's farm) as a conclusion, and a sentence above that as a premise. The word "if" got me thinking that it is inseparable from conclusion above.

I don't get question #4. I reluctantly picked (C) because no other ACs seem to work. After watching the video, I still think that way. How is (E) right?

Can anyone help?

Confusion for most 7Sagers for this question may be that for many other weaken or strengthen questions, JY strictly forbids making another assumption from answer choices--if you have to make another assumption to make an answer choice work, then it is wrong. But for this question, although (E) is obviously more wrong than others, (C) and (D) require you to make assumptions to make it work. This point has been made couple times from other students below.

So when is making assumption allowed and not allowed... that's what confuses most 7sagers I suppose.

#9 and #37, aren't they principle question? I'm confused...

Sufficient Assumption does not have phrase like "must be" because of its nature. Necessary = must. Remember? Also, sufficient Assumptions stems have word "if assumed" about 99% of times. Hope that helps.

I'm not sure why JY is not using lawgic for this one.

After doing this question, I can't resist thinking that you should change your mode of thinking a little bit when approaching a EXCEPT question. For example, in FLAW EXCEPT questions, I think you should count a subtle ones as flaw, that you would not pick as an answer, had it been a plain FLAW question.

If you look at this particular problem, (A), (C), (E) are just giving you some mere possibilities that COULD happen. I mean... I can give you many more similar flaws if you count those things as flaws. i.e) Congleton might have changed her mind; she might be insane, the best workers sent by Congleton got serious health issues recently.. u see?

If one of these MERE possibilities appeared as an answer choice in plain FLAW question(not EXCEPT), would you count that as a flaw?

Like JY said, it'only 8-line argument, and of course it fails to take into account many possibilities.

So, I think for FLAW EXCEPT questions, you need to be in a mode of mind to accept slight flaws as well. And this also applies for other EXCEPT questions. I would like to know what other people think. Thanks.

The word "counterexample" made me choose (C) over (A), although I wans't so confident with my choice. After I read the stimulus, I was looking for an answer choice that says something like "pointing out that politician's proposal, if applied, would lead to an acceptable consequences." But I couldn't find one. I think AC (A) is not a perfect description, but the closest. JY's subtle reaction showed that he is not perfectly satisfied with it either.