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Occam's razor

A compact thinking tool for spotting patterns and avoiding mistakes.

  1. The useful idea

    In philosophy, Occam's razor (also spelled Ockham's razor or Ocham's razor; Latin: novacula Occami) is the problem-solving principle that recommends searching for explanations constructed with the

  2. How it works

    It is also known as the principle of parsimony or the law of parsimony (Latin: lex parsimoniae).

  3. Why it matters

    Attributed to William of Ockham, a 14th-century English philosopher and theologian, it is frequently cited as Entia non sunt multiplicanda praeter necessitatem, which translates as "Entities must not be

Use Occam's razor as a quick check before trusting your first conclusion.

Use Occam's razor as a quick check before trusting your first conclusion.

Test your recall

Which idea belongs to the explanation of Occam's razor?

  • The useful idea — correct
  • How it works
  • Why it matters

In philosophy, Occam's razor (also spelled Ockham's razor or Ocham's razor; Latin: novacula Occami) is the problem-solving principle that recommends searching for explanations constructed with the

EvergreenLast verified 2026-07-19

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