Wonderful! You've made my day. I'm forced to use JRules at work but I love the power and flexibility afforded by the more dynamic nature of JESS.
Regards, Simon Quoting [EMAIL PROTECTED]: > I think [EMAIL PROTECTED] wrote: > > > > > if there is a (B ?a) > > such that ?a doesn't exist > > > (defrule the-rule > (B ?a) > (not ?a <- (A)) > =>) > > actually works fine. > > > > --------------------------------------------------------- > 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] > -------------------------------------------------------------------- > > -------------------------------------------------------------------- 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] --------------------------------------------------------------------