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Weak argument: talk loudly.' Winston Churchill's famous marginal note is a classic example of a meta-equation. More precisely, it is a reminder of the basic principle of total valency: both halves of any equation strive toward self-repetition. In this respect, an equation is the ideal image of any reflection. Mimesis is tautological, and tautology as a universal phenomenon has its equivalent not only in mathematics but also in art; if in mathematics it takes form in an equation, then its ideal genre equivalent lies the riddle (the equation is the rationalization of a riddle, and detective fiction is its dramatization). As it grows into 'higher' genres, the riddle preserves its principle: two equal sides with unknowns, in which the sides demonstrate that they are identical. A riddle is a game. The process of solving it essentially boils down to proving the obvious; one knows from the start that the meanings of the two functions given are equal. This transforms the whole process into a sort of intellectual ostensibility.
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