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I don't think guesses at values are necessarily useless. True, they may
not be practically invaluable, but they can stimulate valuable discovery
as heuristics. Even as false trails, they can be guideposts to
circumstantial exceptions. Maybe I'm thinking also about Kuhn's
paradigmatic model for scientific discovery. We never come to know what's
right by being afraid to be thought wrong. [Added note: True, experience is no replacement for judgment and vice versa.]