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What is a semantic network?

  • A.A neural network whose units correspond to meanings
  • B.A graph whose edges carry probabilities between the concepts
  • C.A graph of nodes for concepts and labelled links for relations
  • D.A network of computers sharing a common knowledge base

Answer: C

A semantic network represents objects and categories as nodes and relations such as is a and has part as labelled edges, which makes inheritance a matter of following links. Its appeal was diagrammatic clarity and its weakness a lack of precise semantics until later work supplied one. Distributed systems, neural networks and probabilistic graphs are different structures. A notation that is intuitive before it is formalised often needs the formalisation before its inferences can be trusted.

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