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What is the Dempster Shafer theory of evidence?

  • A.An extension of probability to continuous variables
  • B.A formalism assigning belief to sets rather than single outcomes
  • C.A method for combining probabilities from independent sources
  • D.A theory of how evidence should be gathered and evaluated

Answer: B

The theory distinguishes belief committed to a proposition from belief merely not committed against it, so ignorance is represented separately from disbelief. Its combination rule behaves surprisingly when sources conflict strongly. Probability combination, evidence gathering and continuity are different notions. A formalism motivated by a genuine distinction that probability handles differently is worth knowing about, even where probability has prevailed.

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