Ugh having a science or health related background makes questions like these difficult sometimes when you have too much background info that confuses you and takes your focus away from the actual purpose of the question.

Ok this one is confusing. So if any of these options didn’t matter, the only option that would be right is the one that is clearly and obviously inconsistent with the conclusion?

Same here!

I did something a bit different. I did, ok so we know that some live on campus and some don’t immediately we cannot assume who is in either population.

So we know that all music majors are in the choir.

MM → choir. It’s necessary that the MM are in the choir, but being in the choir is not sufficient to be a music major.

Ok and the professor concluded that none of the students that live off campus are music majors.

/OC → MM

Lets chain them: /OC → MM → Choir

Then it was easy, A is right because /OC → Choir. None of the students living off campus are in the choir.

Is this thought process right? It feels a bit different than the video.

I don’t get how the flaw is whole-to-part, it still looks like part-to-whole to me. Can someone please explain! Thank you in advance :)

Ok so I THINK I am starting to understand this. Basically a necessary condition to be cited as late is that you must be more than 5 minutes late. But just because you are 5+ minutes late doesn’t guarantee that you are cited as late because there could other factors like, idk be excused or maybe the teacher forgot to cite them.

But, if someone was was cited late, that is sufficient to say they were 5+ minutes late because it is necessary to be 5+ minutes late to be cited as late.

So lets say:

Students are cited as "late" only if they arrive more than five minutes past the last ring. Melissa arrived less than five minutes past the last ring. Therefore, Melissa cannot be cited as "late."

We know for a fact that Melissa cannot be cited as late because they did not come 5+ minutes late. But:

Students are cited as "late" only if they arrive more than five minutes past the last ring. Kumar arrived 17 minutes after the bell. Therefore, Kumar MAY be cited as late.

So basically now that Kumar is 17 minutes late, there is a possibility to be marked as late because to be marked as late, it is necessary to be 5+ minutes late. But being 17 minutes late does not guarantee a late citation.

Can anyone verify or correct my thought process please? Thank you in advance!

Interested