law parsimony

noun Philosophy.

a principle according to which an explanation of a thing or event is made with the fewest possible assumptions.

Origin:
1830–40

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet

law of parsimony
noun
the principle that entities should not be multiplied needlessly; the simplest of two competing theories is to be preferred [syn: Occam's Razor]

WordNet® 3.0, © 2006 by Princeton University.
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00:10

Law parsimony is always a great word to know.

So is ninnyhammer. Does it mean:

a fool or simpleton; ninny.

an extraordinary or unusual thing, person, or event; an exceptional example or instance.

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law of parsimony