Okay, good. That makes a lot more sense.
What you say is true of the counterexamples I've described explicitly so far. But it is just an artifact of their being the simplest representatives of their family. I can construct similar counterexamples where the number of subpopulations in World 2 is arbitrarily large, and each subpopulation has a different expected intelligence. The proportion of people tied for any given expected intelligence can be arbitrarily small.
ETA: Also, these counterexamples work even if we redefine "treating smart people as dumb" to mean, "treating someone in the top 1% as if they were in the bottom 1%". We still have a World 1 where no one smart is treated as dumb, and a World 2 where some smart people are treated as dumb.
Today's post, Why Are Individual IQ Differences OK? was originally published on 26 October 2007. A summary (taken from the LW wiki):
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This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was No One Knows What Science Doesn't Know, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.
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