Answer choice D seems supported to me: it says antihistamine makes you drowsy; so it can help cure sleeplessness by making you drowsy... No???

Can someone help me review the exact logic steps of negate necessary that lead "no A is possible without B", to be translated to A --> B?

I usually understand necessary vs sufficient, but in this case I really struggled. I though that the gift being generous is the necessary condition, and benefit the recipient and is worth more than expected were the sufficient conditions.

Any tip on how to understand this relationship better? I can't wrap my head around it...

I am confused why it is not B... The argument did take the fact that publisher's post stories on lifestyle as indication that they intended to publish stories about based on what they assumed the public wanted.

I get that answer choice C is more correct, but I don't see how B is not a flaw too.

Why is the negated conditional statement A and /B and the some statement A → /B?

Shouldn't they both be (A → /B) in the negated form?

I really do not understand the second example on memorizing conditional indicators and mastering logic. Isn't it true that memorizing indicators is sufficient to master logic, but not necessary (you can master logic in other ways).

I don't get the reasoning otherwise... Mastering logic is sufficient for memorizing indicators? It just does not make sense in my brain even if there is the word "required".

I am confused on question 4, specifically regarding the second sentence. Instead of taking 'in order to" as the indicator for the sufficient condition, I took "must". Which would mean cast --> mixed instead of the opposite. How are we supposed to know which is the main indicator working in the sentence? Wouldn't "must" be a valid interpretation?

I have a question regarding the second problem. For the last sentence "if he doesn't kill Robb he must kill Jon"; there are both the "if" and "must" indicators. Originally I analyzed it as a negate necessary claim because of the "must", so I did:

R -> /J (or contrapositive: J -> /R )

But, then I saw in the video that because of the "if" indicator, it is actually a sufficient condition. So it would be /R -> J (and /J -> R for the contrapositive).

How can you know if it's the necessary condition or sufficient condition when there are indicators for both in the sentence? Does "if" just supersede other indicators?

Don't they always say that just because something is "difficult" doesn't mean it didn't happen?? That's why I chose D.

But what if you interpret the answer C not as size, but genuine space. Yes, you can confidently say there is less space in the same size nest if there are 100 eggs in it vs 3... I think it's a plausible answer choice

Me too!