Hey I am taking the november test and would love to be held accountable!!! my email is ryanwcollins27@.com. Very serious no funny business

Comrade Heinz is right.

If you fail the sufficient nothing happens, you can have the necessary condition be true or untrue, it's free to float. For example, a1 -> b2 (read as a sequencing game rule) If u fail the sufficient condition and put a in spot 3, you can still have b in 2. However, if you fail the necessary, and out b in spot 3, you HAVE to fail the sufficient and can't put a in one. What happens is that necessary condition of b being in 2 is failed, so the conditions that precipitate it must also b failed, or else it leads to contradiction.

using ur second example, if the logic is D -> E and F, the contrapositive is ~F or E -> ~D, so if you dont have either F or E then you can't have D. (when you do the contrapositive u switch and to or and vice versa).

If ur having trouble with these I suggest just always writing the contrapositive so it's easier to see when things trigger, even if it takes a little longer. It's easier imo to look at only the sufficient conditions and see when things trigger vs having to think about failing the necessary and going backwards down the logic chain.

I stared at this question for so long.

the language surrounding "depends" is tricky.

You gotta ask yourself in these cases "what depends?" when you get stuck.

tariff classification DEPENDS on how it is marketed

so the depend is linked to the tariff classification, and since depend is a necessary key word, u throw that guy into the necessary condition.

how item is marketed -> tariff classification.

very easy to get turned around on these, as I was doing mental gymnastics for 10 mins trying to tease this out. Dont get too bogged down in thinking about it as "if then" and just trust the suff/nec trigger words.

Good luck!

Hey I'm currently testing in the high 150s low 160s and would like to get in on some group work to help w motivation.

i would focus on your weakest section (unless it's reading comp bc that is the hardest t improve on).