"Pluralitas non est ponenda sine neccesitate." or
"Plurality should not be posited without necessity."
The words of medieval English philosopher & Franciscan monk William of Ockham (ca. 1285-1349) who was born in Ockham, Surrey.
Basically this advises that given a choice between two explanations, then you should choose the simplest - ie explanation which requires the fewest assumptions.
The term 'razor' derives from the verb to raze, the 'cutting away of extraneous material'.
The concept is also often expressed in Latin as the lex parsimoniae ('law of parsimony').
The counterargument to Occam's razor in the medical profession is Hickam's dictum, attributed to John Hickam, MD from Duke University in 1950s.
Posted by ALCHEssMIST.
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