It Is Better To Solve A Problem With A Crude Approximation And Know The Truth, Plus Or Minus 10 Percent, Than To Demand An Exact Solution And Not Know The Truth At All.

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It is better to solve a problem with a crude approximation
and know the truth, plus or minus 10 percent, than to demand
an exact solution and not know the truth at all.
-- Thumb's First Postulate

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