(One of the great things about being a TA at a university is that it allows me to recognize pet-peeves that I never knew I even had. In order to deal with some of the frustration in a passive-aggressive but slightly bemused manner that others may enjoy, I'll share bits and pieces of my favorite peeves here. Note: I changed the title of this ostensible series. It was a little too snarky, I think.)
Case 1: That funny habit that students have of overstating their claims by declaring them 'clear' or 'obvious'. As in, "we can obviously see that so-and-so is clearly a symbol of such-and-such", whereupon they proceed to explain why this is so for the rest of the paragraph. Clearly (tee-hee), this begs the question - if it's so obvious, then why do you even need to waste your/my time explaining it to me?