I think Paul Curt wrote: > Hi, > I am trying to understand the advantage of backwward chaining. > Is it possible to get the facts that cause the rule failure. > For example : > conditions : A is an animal and A flies > consequences : A is a bird > If I make a query which conclude that my object is not a bird, I'd like > to know why it's not a bird : is it not an animal ? does it fly ? > I am wondering if getting the "false facts" for a rule is possible with > jess. > Thanks for any help.
Well, yes, I guess you could look at it that way. You can't exactly get "the facts that caused a rule to fail", as of course those facts don't exist. You can get an indication of what facts would have been needed -- those are the "need-X" facts described in the manual. --------------------------------------------------------- Ernest Friedman-Hill Science and Engineering PSEs Phone: (925) 294-2154 Sandia National Labs FAX: (925) 294-2234 PO Box 969, MS 9012 [EMAIL PROTECTED] Livermore, CA 94550 http://herzberg.ca.sandia.gov -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
