common knowledge

common knowledge

English

Pronunciation

  • Audio (Southern England):(file)

Noun

common knowledge (uncountable)

  1. That which is known by most people, and thus cannot reasonably be contested.
    • 1914, Ernest Bramah, Max Carrados:
      A limited liability company is not subtle, Mrs Straithwaite. This one knows that you have insured a five-thousand-pound pearl necklace with it, and when it becomes a matter of common knowledge that you have had one answering to that description stolen, it jumps to the conclusion that they are one and the same.
  2. (logic, game theory) A special kind of knowledge for a group of agents, such that when all the agents in a group G know p, they all know that they know p, they all know that they all know that they know p, and so on ad infinitum.

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