There already exists a CountTruthValue which currently  is always uses as a "ProbabilityAndCountTruthValue".

I propose renaming SimpleTruthValue to PLNTruthValue, renaming CountTruthValue to ProbabilityTruthValue, and creating a brand new FuzzyTruthValue.

Any suggestions for what the semantics of any of these should be? That is, for example, I don't know how to convert a ProbabilityTruthValue into a PLNTruthValue .. does this matter? Would anyone care?  (so e.g. the probability of an obscure word would be very low; this does not imply that its PLN-stength or confidence is low).