The Heuristic argument reference article from the English Wikipedia on 24-Apr-2004
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Heuristic argument

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A heuristic argument is an argument that reasons from the value of a method or principle that has been shown by experimental (especially trial-and-error) investigation to be a useful aid in learning, discovery and problem-solving. A widely-used and important example of a heuristic argument is Occam's razor.

See also