The honest answer: because it shouldn’t work and has never been done before. TeX has no arrays, no functions with return values, no convenient local variables or stack frames, no integers bigger than 2^{31}-1, no bitwise operations. Macro expansion can recurse, but you get no call stack and deep recursion quickly hits engine limits. What TeX does have is a Turing-complete macro expansion engine and, with e-TeX extensions (used by modern pdfTeX), up to 32,768 integer registers called \count. That turns out to be just barely enough to implement a chess engine.
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，更多细节参见新收录的资料
Bourdieu doesn’t claim we’re sitting around deliberately calculating what we should like. It’s more that some hidden part of your brain infers that liking (or disliking) something will benefit you. And then you find that you actually start liking (or disliking) it. So the previous cartoon should look more like this:
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