Super World Class Smart

[goofball]

In a thread in SMP Sklansky said the following:

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Only in some very specialized endeavors do I consider myself super world class smart. Such as teaching moderately intelligent eight year olds to do word problems that require quadratic equations. I'm also more likely to come up with clever shortcuts or creative analogies regarding certain types of problems, than most of those people who are a little smarter than me.

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It most likely would be something very specific as above for obvious reasons. For example I would never consider saying "doing physics" or "teaching" or even "teaching children gymnastics" despite considering myself to be very good or excellent at all of those things.

So, is there something at which you consider yourself to be world class and why?

(David what, if any, are the others for you?)