Occam's razor
Say it: OK-umz RAY-zuh /ˌɒkəmz ˈreɪzə/ · noun
What “Occam's razor” means
Prefer the simplest explanation that fits all the facts.
More precisely: The principle that the simplest explanation that fits the facts is usually the best.
When to use it
In thoughtful conversation, when several explanations fit and you want to avoid adding unnecessary assumptions.
Memory trick
Picture a razor shaving away extra assumptions, leaving an explanation that still fits the facts.
Similar words
law of parsimony, principle of simplicity
Where it comes from
Named after William of Ockham, a 14th-century English philosopher.
Quick check
A missing biscuit and crumbs on your dog's nose suggest snacking, rather than an elaborate burglary. Which principle favours that explanation?
confirmation bias or Occam's razor?
Show the answer
Occam's razor
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