I teach Perl (among a lot of other things) at a high school. From my point of view, I'd much prefer a student who thought and challanged my errors (not me, just my mistakes) than a sit-there-and-drool-don't-even-pretend-to-be-interested student. It sounds like you have a good attitude about it. Teachers are only dangerous if they pretend to know more than they do.

The discussion could be instructive to the other students as well.

good luck

Time flies like an arrow, fruit flies like banannas