Yudkowsky has a way of thinking that he believes everyone else should adopt. He is skilled at using phrasing to frame his statements in his way of thinking.
For example, instead of saying something like, "a lot of people think college is good," he phrases it in terms of a bias. Why? Because if he can get the other person talking about the subject in terms of biases, then he has advanced his own favorite way of thinking.
But is liking college really a bias? And if so, compared to what norm? He offers no explanation; he just asserts it.