I actually think it does follow. Understanding what people of different races experience is, apparently, a major cognitive blind spot. For instance, lots of people think that racism was a problem forty years ago, but isn't a problem today. But what did people forty years ago think?

"[I]n mid-August 1969, forty-four percent of whites told a Newsweek/Gallup National Opinion Survey that blacks had a better chance than they did to get a good paying job--two times as many as said they would have a worse chance?.

Sure,we've probably made progress since then. But if there is still widespread discrimination, would you notice? If you read the recent post from gwern on the psychology of power, you'll notice that this is just another application of a common set of biases.

There is, of course, also the issue of women; someone else brought up Larry Summers. Having women involved makes teams more effective -- that's instrumental rationality right there. And, of course, we have a fair number of philosophical debates here. It's well known that women have different philosophical intuitions than men. I would not be at all surprised to learn that the same is true of people of color. As Jef Raskin notes (in a completely different context), intuitive means familiar. Having had a different set of experiences would, of course, change what is familiar. To the extent that our debates rely on intuition, perhaps without our even noticing it, it's extremely valuable to get a different perspective.

When you link to people like VDARE, you are sending a very strong signal that you would really rather not have people of color here. Nobody likes to be part of a community where their ethnicity or gender is a reason to dismiss them as just not that smart. And this is an especially rough burden on people who are more likely to dissent from the local consensus by reason of their differing intuitions and experiences.

If you really, instrumentally, care about having people of color read Less Wrong, and you really care about coming to the correct conclusions, you ought to do what you can to make this a less unpleasant space to be around. Otherwise, you'll be excluding a bunch of interesting people and missing a bunch of useful data, and you'll never even notice.