what really helped me was thinking of these questions as a bridge. Which correct answer choice will help show the connection from the premise to the conclusion. Whats missing from the premise that needs to be there for the conclusion to be supported

are negative rules usually wrong answers?

For question 13, "The only oral myths that have survived are the ones that were eventually written down" my two points were "survived" & "written" I interpreted this as "only" being the necessary indicator so the idea that follows is the necessary which would be "survive" meaning: written→survive

why is it survive→written?

for question 10, I understand /h. however, could you also draw the conclusion that Mr. White could grow weed then make meth?

I originally had it the same way. However, the second sentence of question 4 states "However, in order to mix plant material into garden soil, one MUST know how to cast the Herbivicus Charm.". "Must" is what we need to look at to see that it is a necessary indicator and whatever follows "must" needs to be necessary. So it would be M→HC. I hope that made sense