home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!cs.utexas.edu!tamsun.tamu.edu!azariah.tamu.edu!emily
- From: emily@azariah.tamu.edu (Emily Glass)
- Newsgroups: comp.ai.fuzzy
- Subject: Re: What does "AND" mean?
- Date: 22 Jan 1993 15:26:50 GMT
- Organization: Texas A&M University, Dept. of Electrical Engineering
- Lines: 82
- Message-ID: <1jp3nqINNouk@tamsun.tamu.edu>
- References: <1993Jan21.225423.25301@netcom.com>
- NNTP-Posting-Host: azariah.tamu.edu
-
- In article <1993Jan21.225423.25301@netcom.com> gperkins@netcom.com (Glen C. Perkins) writes:
-
- >(wo)man, .5 is average, 1.0 is to die for, and 0.0 NICE is intolerable,
- ^^^
-
- I'm really *glad* to see someone finally took the "sexism" out of
- this example :). (There are a few of us women who read this
- net too :) )
-
- >.5 is average, 1.0 is an angel. If I decide to use MIN to represent AND
- >(the most common definition of AND in fuzzy systems), I get:
- >
- >.7 PRETTY AND .5 NICE = .5 INTERESTED
- >
- >Okay, fine, but this means that she could get prettier approaching
- >1.0 ("to die for") without my interest increasing at all. In other
- >words, if she were .5 NICE, I WOULDN'T EVEN CARE whether she was
- >average (.5) or gorgeous (1.0), it would be just the same to me.
- >Needless to say, that's not what I observe! At least in this case,
- >when I say "AND" I don't seem to mean MIN.
-
- ... stuff deleted ...
-
- >Ultimately, it appears that the only way to model this deceptively
- >simple and I think typical psychological rule: "the prettier and the
- >nicer, the more interesting" would be for me to sit down and build a
- >truth table. I'd probably need to make one axis PRETTY and one axis
- >NICE in, say, increments of 0.1, and then ask myself how I'd feel
- >about each combination. Then I'd try to figure out what the function,
- >INTEREST(PRETTY, NICE) really was.
-
- ...
-
- >+-----------------------+---------------------------------------------------+
- >|--- Glen C. Perkins ---| |
- >| <gperkins@netcom.com> | "Don't forget, your mind |
- >| Native Guide Software | only *simulates* logic." |
- >| Palo Alto, California | |
- >+-----------------------+---------------------------------------------------+
- >
-
-
- I can't answer your question about with AND to use, but it looks
- like you need to have your fuzzy sets broken down into "finer"
- distinctions:
-
- looks:
-
- REAL_UGLY SORT_OF_UGLY PLAIN ATTRACTIVE GORGEOUS
-
- personality:
-
- NASTY INDIFFERENT NICE REALLY_SWEET
-
- control functions:
-
- NO_INTEREST INDIFFERENT SLIGHT_INTEREST SOME_INTEREST LOTS_OF_INTEREST
-
- Then you can make rules like:
-
- (If you are a heterosexual woman (or a gay man), substitute "he" for "she")
-
- If she is REAL_UGLY then NO_INTEREST.
-
- If she is NASTY then NO_INTEREST.
-
- If she is INDIFFERENT and GORGEOUS then SLIGHT_INTEREST.
-
- If she is REALLY_SWEET and GORGEOUS then LOTS_OF_INTEREST.
-
- If she is REALLY_SWEET and ATTRACTIVE then LOTS_OF_INTEREST.
-
- If she is REALLY_SWEET and PLAIN then LOTS_OF_INTEREST.
-
- If she is NICE and PLAIN then SOME_INTEREST.
-
- ... etc...
-
- You may not need this many catagories, but you will proably need more
- than just "PRETTY" and "UGLY" for this example.
-
- Emily
-