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Chapter 17
Membership
Sugar content
Fig.
17.8: Common linguistic hedges
Negation,
Conjunction, and Disjunction
The most basic logical operations are NOT (negation), AND (conjunc-
tion),
and OR (disjunction). In Boolean logic, NOT X is true if and
only if X is false. X AND Y is true if and only if both X and Y are
true.
X OR Y is true if and only if at least one of
X
or Y is true. We
need a means of evaluating the results of these operations when
dealing with fuzzy sets.
There is actually a fantastic array of choices for computing
fuzzy logical operations. Many of them even have practical use. For
an extensive list of the possibilities, alon ...