Occam’s razor, a problem-solving principle attributed to the English friar and philosopher William of Ockham (c.1287-1347), holds that among competing hypotheses, the one with the fewest assumptions should be selected.
Scientists do not consider it an irrefutable principle, just a preference based on how easily evidence can be falsified. The more variables introduced or implied, the tougher your hypothesis is to test.
In short, K.I.S.S. Keep It Simple, Stupid.
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