It's when I'm trying to have a reasonable discussion with someone about some particular point that is close to me and I've done some work trying to gather evidence for my case, and the person I'm discussing it with says, "Oh, well you're just saying that because you care about the outcome and you just want to belive that it is the way you say it is". And then they procede to discount anything I may say to support my statements based on the fact that I care about my position!
WHAT THE FRELL!?!?!
Of course I care about my position! If I didn't, I'd say so and tell you I'm simply arguing it for the sake of argument! And since when does someone's personal emotional investment in a position invalidate any evidence that they might have gathered in support of that position? If a DA personally is upset by the fact that someone shot a child, it doesn't invalidate the fact that they have him on film doing the shooting. Why should my evidence or supporting facts mean any less simply because I care about the position I am trying to argue?
It's weak-minded statements like "well, you care too much so anything you say doesn't count" that really irk me. How can a person possibly think that makes any kind of sence? Moreover, after they say that, they get all smug and happy as though they somehow "won" the argument!
Probably the worst part of it, though, is that I run into freaks that do that all the fscking time! It's the main reason I've stopped voicing my opinion amongst the general public. Not because I'm afraid someone will try to argue it with me, I'm just a jaded bastard who's had to put up with ignorant nimrods saying my argument, no matter how perfectly logical and well-supported it may be, doesn't matter because I "care too much about the outcome".