- Fuzzy rule
A

**fuzzy rule**is defined as a conditional statement in the form::**IF**"x is A":**THEN**"y is B"where x and y are linguistic variables; A and B are linguistic values determined by fuzzy sets on theuniverse of discourse X and Y, respectively.**Comparison between Boolean and fuzzy logic rules**A classical

**IF-THEN**statement uses binary logic, for instance::**IF**"man_height is > 180cm":**THEN**"man_weight is > 50kg"Classical rules are expressed in Boolean logic. On the other hand, fuzzy rules are multi-valued. In fuzzy rules, the universe of discourse of the variable man_height is a fuzzy set (tall, medium, short). For example::

**IF**"man_height is tall":**THEN**"man_weight is heavy"**See also***

Fuzzy logic

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