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This can be regarded as a more general approach to representing uncertainty
than the Bayesian approach.
Bayesian methods are sometimes inappropriate:
Let A represent the proposition Demi Moore is attractive.
Then the axioms of probability insist that
Now suppose that Andrew does not even know who Demi Moore is.
- We cannot say that Andrew believes the proposition if he has no idea what
- Also, It is not fair to say that he disbelieves the proposition.
- It would therefore be meaningful to denote Andrew's belief of B(A) and
as both being 0.
- Certainty factors do not allow this.