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What is a knowledge base in a symbolic system?

  • A.A library of algorithms the system can select between at run time
  • B.A store of sentences about the world in a formal language
  • C.A collection of training examples used to fit a model's parameters
  • D.A database of past decisions the system has taken and their outcomes

Answer: B

A knowledge base holds sentences in a representation language, and an inference procedure derives new sentences from them, so what the system knows is separate from how it reasons. That separation is what allows knowledge to be added without rewriting the reasoner. Training data, decision logs and algorithm libraries are different artefacts. Keeping declarative knowledge apart from procedural machinery is the founding architectural idea of the knowledge based tradition.

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