A quantity is said to be exact if it has a precise and well-defined value.

J. W. Tukey remarked in 1962, "Far better an approximate answer to the right question, which is often vague, than the answer to the wrong question, which can always be made precise" (Bailey et al. 2007, p. 25).

See also

Closed-Form Solution, Exact Covering System, Exact Differential, Exact First-Order Ordinary Differential Equation, Exact Form, Exact Functor, Exact Sequence, Exact Solution, Exact Trilinear Coordinates, Iff, Least Period

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Bailey, D. H.; Borwein, J. M.; Calkin, N. J.; Girgensohn, R.; Luke, D. R.; and Moll, V. H. Experimental Mathematics in Action. Wellesley, MA: A K Peters, 2007.

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Cite this as:

Weisstein, Eric W. "Exact." From MathWorld--A Wolfram Web Resource.

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