A crab canon is an arrangement of two things that are complementary and backward. Originally it is a musical term for a kind of canon in which one line is reversed in time and pitch from the other (e.g. FABACEAE <=> CGCEGFGB). The use of the term in non-musical contexts was popularized by Douglas Hofstadter.
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... income for a household in the town is $68,125, and the median income for a family is $71,726. Males have a median income of $51,332 versus $32,188 for females. The per ...