In everyone's life comes a time when you disagree with what's being fundamentally taught to you. You know, like when that kid you used to play with tried to teach you eating snot was fun and that watching each other pee was the funniest thing in the world. Or perhaps when your lecturer who has a major in biochemistry tries to teach you mathematics... and his equations on the board resemble something vaguely familiar, until you realise that vaguely familiar thing is a fish... with tentacles.
There are times when lecturers decide to torture the students with questions that are far and beyond the capabilities of what you now and will ever know, simply because they wish to show off some of their own misplaced, insecurity-ridden knowledge. Unbeknownst to the lecturer: he has only managed to amass a regular audience of students due to their unnerving unwillingness to be deterred from learning by a large bread-looking alien who happens to know a lot about fungi because a lot of it grows in his beard.
There are times when you encounter a lecturer who likes to waste a lot of time on things 'you don't really need to know', and very little time on things 'that will actually be in the test'. I believe in situations like this: one should just write, "The Answer is 42" when faced with writing a test set by such a lecturer. If this mathematics-teaching-biochemist truly understands the nature of the universe and the mathematics he taught you, he would surely have complete sympathy and otherworldly understanding of that more than adequate answer.
On the other hand you get lecturers who tell you what is 'important' and then test you on everything that is 'NOT important'. In cases like this: should you require the services of a clean and inefficient hitman - please do hesitate to contact one - lecturers like this are important to the multi-versal ecosystem of trolls.
In other cases one may encounter a lecturer who may have the best intentions, a wealth of knowledge, but unfortunately poor navigational skills when it comes to choosing a planet that understands his accent. In such endearingly painful cases one should remember that there are such things as Babel fishes. If you don't have a Babel fish, there is Google translate - which is the next best thing. If that fails, take a video, put it up on YouTube for the world to sympathise, and skip class till you find another lecturer who speaks English.
If any of these special individuals lecture you and you ever have the unfortunate business of fending off a question from them, just tell them, "The Answer is 42".