cupholder comments on The Correct Contrarian Cluster - Less Wrong

38 Post author: Eliezer_Yudkowsky 21 December 2009 10:01PM

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Comment author: komponisto 22 December 2009 03:26:57AM *  28 points [-]

Along with 99% of humanity my IQ isn't high enough for me to ever understand the math behind quantum physics

This may be a tangential point, but I need to say this somewhere: claims like this are quite likely false. (Notice how rarely they're accompanied by justification.)

Quantum mechanics is new (in the scheme of things). So, of course, we see right now that the only people who understand it are very smart people: the ones who first thought of it and their students and associates. But that doesn't mean that no one else can understand it; it just hasn't had time to trickle down into everyone's general education yet.

300 years ago, you could have replaced "quantum" by "classical" in that sentence, and it would have seemed reasonable: at that time, only a few dozen people in the world understood the differential and integral calculus. Yet now this kind of mathematics is taught regularly to hordes of IQ 110 college freshmen, and (I expect) is considered elementary and routine by a majority of LW readers. Taking an Outside View approach here, I don't see any reason not to expect that the same trend will continue into the future, with quantum mechanics eventually being considered a grade-school subject (even without recourse to transhumanist solutions such as intelligence enhancement, which will immediately come to the minds of many readers).

Going back further, once upon a time literacy was an elite skill. Now we take it for granted, but how much do you really think our IQs have improved in the last couple thousand years?

And let's not forget that even now, we already know that the fundamental mathematical ideas behind quantum mechanics are actually quite simpler than you would have thought from listening to physicists -- little more than linear algebra over complex vector spaces.

Comment author: cupholder 10 June 2010 03:12:27AM *  11 points [-]

Going back further, once upon a time literacy was an elite skill. Now we take it for granted, but how much do you really think our IQs have improved in the last couple thousand years?

A lot! Western IQ scores have improved by ~30 points since IQ tests were invented around a century ago. And literacy is probably part of a positive feedback loop that historically boosted IQ: increased literacy improves IQ, and higher IQ increases literacy. That feedback loop likely hasn't been going for two thousand years, but it's been going for at least two hundred years, which is more than enough time for a feedback loop to go nuts.

Still, though I suspect IQs have improved massively in the last couple thousand years, I definitely agree with your comment. I think the rise in average IQ over time doesn't mean we've gotten qualitatively smarter, more that our environment has - and one aspect of that is the trickle-down effect of mental tools like literacy, classical mechanics, and quantum mechanics.