OK, now tell us why you would want to change the default conflict
resolution strategy, mainly the one that says that the most recent
rule will fire first. Actually, it's a "bit" more complex than that
and the reasoning for using MEA versus LEX versus other methods were
explored and answered many, many years ago by Dr.'s Newell and Simon,
the mentors of several of the illustrious C&M alumnae. Anyway, MEA
and LEX et al are all discussed in several well-written books on the
subject, primarily Cooper and Wogrin or Girratano and Riley. So, in
answer to your original question, the reason is that the conflict
resolution strategy has determined which rule would fire first and
the reasoning of the conflict resolution strategy should remain like
it is unless you understand the reasoning and have a good reason for
changing the same. (Goodness. Don't we sound pompous
tonight?) :-) Perhaps I should read more and write less...
SDG
jco
On Nov 20, 2005, at 4:51 PM, Nicolas Fortin wrote:
Hello everybody,
I am wondering if it is possible to randomize the firing order,
when one rule is activated by many facts. Indeed a rule is always
fired according the reversed order of assertion. So this example
(reset)
(assert (a 1))
(assert (a 2))
(assert (a 3))
(defrule example
(a ?x)
=>
(printout t "a = " ?x crlf)
)
(run)
will always output :
a = 3
a = 2
a = 1
Thanks in advance,
Nicolas
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