On 14 September 2010 17:47, Mark Proctor <mproctor(a)codehaus.org&gt; wrote: I don't recall having proposed anything relating to this? My last proposal was making FOL quantifier result "false" non-blocking for LHS evaluation and accessible through a binding variable. As this is now public, I asked around for opinions on my short paper<http://members.inode.at/w.laun/drools/EnhancingFOL.pdf>, and here is one comment, which I interpret to be positive and encouraging: <quote> It seems to me that the most powerful new concept here is the ability to directly combine Boolean statements about WMEs with Boolean statements about other quantities in the same expression, at the same level -- i.e., to be able to directly express "(some WME exists) || f(x) == 3", *which is awkward at best in most rule languages*. </quote> (Emphasis added by me.) Cheers Wolfgang