The more difficult trick, at least for me, is avoiding smart people who offer stupid opinions on topics with which they are absolutely unfamiliar.
A more difficult trick yet is to notice when even smart people will offer stupid opinions on (noxious) topics, even when they are familiar with them.
What do you mean by "noxious" topic?
A post from Gene Expression by Razib Khan who some of you may also know from the old gnxp site or perhaps from his BHTV debate with Eliezer. Some thoughts on the problem of trying to optimize your interactions to help you be less wrong. Your time is quite limited. Expect trade-offs.
Debating group consensus with the group is less productive than debating it with individuals making up that group. Avoiding smart people who offer stupid opinions on topics with which they are absolutely unfamiliar is expensive. The internet has made this somewhat harder. We should like make an app to fix this or something.