I've been analyzing my own behavior and I realized that knowing more about rationality and biases and so on is a double-edged sword. On the one hand, it allows me to evaluate ideas in a better way, but on the other (the human brain being what it is), being right about a lot of things leads to arrogance and a belief that one is always right. This is compounded by the use of the upvote/downvote system, which only makes this problem worse. It's so easy to fall into the trap of arrogance when you have a large number of upvotes on your posts. It's also easy to fall into the trap of thinking that one is immune to this sort of self-deception.

Sadly I've been seeing this type of behavior often here, and sometimes even from established members.

I can't think of any solution except a total rehaul of the social dynamics of the site. There must be a better way of having more rational discussions than petty disagreements and blind anonymous upvotes/downvotes.