Re: A simple question

WSiler (wsiler@aol.com)
Sat, 6 Jun 1998 23:39:05 +0200 (MET DST)

>>2. what fuzzy logic controlers can do that a Neural Net can't?"
>>

>>Assuming a sufficiently broad selection of each, theoretically
>>nothing.
>
If the question is restricted to relatively simple fuzzy controllers,
the above reply may be correct. But if we enlarge the question to include fuzzy
expert systems generally, of which fuzzy controllers are a subset, then what
the fuzzy expert system can do is to model the thinking processes of an expert
in some field; neural nets, being more-or-less model-free, can't do this. The
neural net MIGHT be able to achieve about the same outputs for the same inputs
as a simple fuzzy expert system, but this is not at all the same thing as
modelling the expert's thinking process. In short, a NN is a hand-tuned tool
for function approximation; a fuzzy expert system is a general AI technique.

William Siler

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