The 10% who understand things like
iteration, arrays, the idea of restricted syntax, the fact that DWIM is not a command in any known computer language.
As for the rest of us - someone I know asked a user to input a list of things into Word using Tab as separator. The user did what she was told, but she used spaces. When asked how the hell the computer should distinguish between the spaces that separate groups and the spaces inside groups, she smiled.
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179. I will not outsource core functions.
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[link|http://omega.med.yale.edu/~pcy5/misc/overlord2.htm|.]