# Fuzzy rule

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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 the universe 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"

* Fuzzy logic

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