I think this is because "/pilot → blind", would mean that anyone that is not a pilot, is blind. Wheres, "pilot → /blind", means that if someone is a pilot, they are not blind. But just because someone is not a pilot, does not mean they are blind.

agreed, this section helped me apply everything

for these kinds of questions, do we use outside knowledge?

Is #1 under "some example PAI question stems include", a typo? That is not even a question.

#help