AC C seemed to obvious to be correct so I went with D

bad question

I don't understand how D is correct. Why do the characteristics NEED to be from the star itself? Couldn't there be characteristics such as what time of day we measure it, what time of the year, where we are on earth, what is in between us and the two stars, what position the stars are in their orbit. Like these characteristics have nothing to do with the star itself but can still be measurable characteristics that can correlate with the brightness we observe, making D (which says they needs to come from the stars) not necessary?

What about all of the items moving around in the room for ac A. I picked D because A seemed to be people with nonconflicting info in both rooms whereas D was saying yes both these people have nonconflicting info so of course one of them isn’t likely to have more motion sickness than another (aka getting rid of alternate hypothesis by saying that when they are both not getting conflicting info no one is more likely than the other to get motion sickness).

I thought answer choice A was correct because in the RRE lessons sections you said it wasn't valid to assume that the people were negligent or wouldn't "take the path of least resistance" when explaining why certain answers were incorrect. Here they are looking for an incorrect answer so wouldn't the reverse be true? I.E. since its a wrong way to explain the phenomenon in other questions, wouldn't it be wrong here as well (which would actually be the right answer because its an except question)?

1/5 on hardest got me bagged

#feedback I feel like it would be nice if this section had a written review lesson that listed all the different flaws we encountered. This would help solidify all the variations we were exposed to without having to go back to each lesson and see what new flaw was introduced.

I have been thinking about these questions as RRE questions and it has been helpful. For example, D explains why the conclusion is wrong (which we know from it being a flaw question) which becomes the right answer. I don't know how reliable it is but I have used it a few times throughout this section and it has been beneficial.

I picked A because even if their translation techniques are inaccurate, that doesn't mean their studies are. Two alternate methods can shed light on this. For example, a study done by pure observation. This would require no translation and could still lend the scientists to a valid conclusion, we use studies by observation exclusively with things like animals. The second method comes down to a work around of the translation issue. What if you had someone that spoke both the scientist language and the subjects language without translation issues. This would maintain the idea that the scientist and subjects couldn't speak with one another accurately but would allow them to still communicate effectively through a third party. This is why I couldn't justify getting rid of A even on blind review because it seemed irrelevant since i could think of two fairly simple ways to still draw the conclusion without compromising AC A.

Could it also be considered context/fact? If the question had an answer choice stating it was a fact I would have had a hard time deciding if it was a premise or a fact and I was wondering if anyone had any insights into how to tell the difference.

I picked E because if the cost of the tuition has been going up over the last few years AND the applicant pool has gone down then how could the argument ever make any sense. I also thought A wasn't necessary because anyone making any argument can always be wrong, it's not like the president had to be correct. SMH