Message-Id: <m0si1Md-0000ZHC@xiron.pc.helsinki.fi>
Date:         Mon, 14 Aug 1995 07:29:00 -0700
Reply-To:     "John E. Clifford" <pcliffje@CRL.COM>
Sender:       Lojban list <LOJBAN@CUVMB.BITNET>
From:         "John E. Clifford" <pcliffje@CRL.COM>
Subject:      negation
To:           Veijo Vilva <veion@XIRON.PC.HELSINKI.FI>
Content-Length: 941
Lines: 17

belknap:
In fuzzy terms, some predicates vary from zero to one, others from zero
to infinity, others from negative one to positive one, others from
negative infinity to positive infinity.
pc:
I thought (and this takes us back to another thread from a while ago)
that fuzzy was strictly on the reals [0,1].  The concept of a negation in
in a 0-inf system presents some lovely problems if you want to get
anything like laws that make it plausible to call the sucker a negation
rather than just another value.  Come to think of it, negation even in
the various neg-pos systems is not too obvious either, since presumably
you do not want double negations always to come to 0.  Of course,
opposites are different from fuzzy (in the restricted sense)
complements; the latter are just the contradictories, while the
opposites usually have pretty much independent curves, except that the
steep part of one has to be in the tail of the other.
pc>|83