Probability vs. Fuzziness
From FLWiki
It is important to understand that in the way Flying Logic documents are set up by default, confidence values represent fuzzy boolean values, not probabilities. The basic distinction to remember is that probabilities deal with the uncertainty or likelihood of whether something may occur, while fuzzy logic (from which fuzzy booleans derive) deals with ambiguity or vagueness about what has, or has not, occurred. The following statement is probabilistic:
- The food in the pot may boil over.
...while the following statement is fuzzy:
- The food in the pot is hot enough to eat.
Combining probabilities is done using multiplication, as in the case of determining the probability of two coin flips both coming up heads (50% × 50% = 25%). To combine fuzzy statements you use fuzzy AND, OR, and NOT operators, which correspond to mathematical minimization, maximization, and complement. (“hot water” AND “steep tea bag” SUFFICIENT FOR “hot tea”).
