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For what it's worth, the credit score system makes a lot more sense when you realize it's not about evaluating "this person's ability to repay debt", but rather "expected profit for lending this person money at interest".

Someone who avoids carrying debt (e.g., paying interest) is not a good revenu...(read more)

So if you're giving examples and you don't know how many to use, use three.

I'm not sure I follow. Could you give a couple more examples of when to use this heuristic?

Seems I'm late to the party, but if anyone is still looking at this, here's [another color contrast illusion]( that made the rounds on the internet some time back.

For anyone who hasn't seen it before, knowing that it's a color contrast illusion...(read more)

Commenting in response to the edit...

I took the Wired quiz earlier but didn't actually fill in the poll at the time. Sorry about that. I've done so now.

Remarks: I scored a 27 on the quiz, but couldn't honestly check any of the four diagnostic criteria. I lack many distinctive autism-spectrum ch...(read more)

A minor note of amusement: Some of you may be familiar with [John Baez](, a relentlessly informative mathematical physicist. He produces, on a less-than-weekly basis, a column on sundry topics of interest called [This Week's Finds]( more)

Ah, true, I didn't think of that, or rather didn't think to generalize the gravitational case.

Amusingly, that makes a nice demonstration of the topic of the post, thus bringing us full circle.

Similarly, my quick calculation, given an escape velocity high enough to walk and an object 10 meters in diameter, was about 7 * 10^9. That's roughly the density of electron-degenerate matter; I'm pretty sure nothing will hold together at that density without substantial outside pressure, and since ...(read more)

I don't think you'd be landing at all, in any meaningful sense. Any moon massive enough to make walking possible at all is going to be large enough that an extra meter or so at the surface will have a negligible difference in gravitational force, so we're talking about a body spinning so fast that i...(read more)

It's an interesting idea, with some intuitive appeal. Also reminds me of a science fiction novel I read as a kid, the title of which currently escapes me, so the concept feels a bit mundane to me, in a way. The complexity argument is problematic, though--I guess one could assume some sort of per-uni...(read more)

The example being race/intelligence correlation? Assuming any genetic basis for intelligence whatsoever, for there to be absolutely *no* correlation at all with race (or any distinct subpopulation, rather) would be quite unexpected, and I note Yvain discussed the example only in terms as uselessly g...(read more)