Has anybody ever seen a situation where a couple of patterns such as<br><br> Fact( field >= 10 )<br> not Fact( field > 20 )<br><br>was appropriate? This does not match Facts where field isn't between 10 and 20, and so it would seem to be the same as<br>
<br> Fact( field >= 10 && <= 20 )<br><br>but actually it doesn't match any such Fact whenever any <i>other</i> Fact with field > 20 is around.<br><br>Cheers<br>Wolfgang<br>