🚀 go-pugleaf

 
# Ok! here it is...
# 
# Author: Bradley L. Richards
# Title: When facts get fuzzy
# Journal: Byte, April 1988, pages 285-290.
# 
# Bradley also wrote  the Fuzzy Prolog Interpreter (in Ada)
# It used to be available on BIX and BYTEnet
# He also wrote a master thesis: "Programming in Fuzzy Logic: Fuzzy Prolog"
# On his article in BYTE he indicates that a copy of his thesis was available
# (for $30.95)  from the National Technical Information Service (703) 487 4650.
# The document to request is #ADA177940.
# 
# If you give me your mailing address or FAX I could send you a copy of
# the article in BYTE.
# 
# Good Prologing...!
#    -Jose-

A thesis being what it is, you're likely to find the BYTE article easier to
read.
Also, ADA being the wonderfully standardized language that it isn't, some
people
have reported problems compiling the Fuzzy Prolog interpreter under their Ada
compilers (including a more recent version of the compiler I used when I wrote
it).

Hence, I'd suggest that you use the methods outlined in the BYTE article to
implement fuzzy reasoning under whatever Prolog you normally use.  The
article
specifically discusses Turbo Prolog, which was popular at that time, but the
code should be easily portable to any Prolog system.

Cheers,

Bradley