Re: Adding more evidence


Subject: Re: Adding more evidence
WSiler@aol.com
Date: Fri Jan 21 2000 - 20:28:33 MET


In a message dated 1/21/00 5:18:38 AM Central Standard Time,
jefdrake@nmsu.edu writes:

<< The output of a fuzzy inference system is another fuzzy set.
 To get any "crisp" value from this relationship the output must be
 "defuzzified".
>>

It is completely untrue that a discrete fuzzy set of alternatives must be
defuzzified; in fact, it may not even possess membership functions defined on
the real line. It is a common illusion among fuzzy control people, perhaps
because in typical fuzzy control rules defuzzification is inescapable. This
is a bit too complex a subject to deal with in an EMail; I suggest visiting
my Web site and looking at the manual on fuzzy expert systems to be found
there.

William Siler.

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