EF-GATHER-ISA-RULE-INDEX"></a>function <tt><strong>GATHER-ISA-RULE-INDEX</strong> : (collection sense &amp;optional mt direction)</tt><br />Return a list of all non-gaf assertions (rules) such that:<br />a) if SENSE is :pos, it has a positive literal of the form (isa &lt;whatever&gt; COLLECTION)<br />b) if SENSE is :neg, it has a negative literal of the form (isa &lt;whatever&gt; COLLECTION)<br />c) if MT is non-nil, then MT must be its microtheory<br />d) if DIRECTION is non-nil, then DIRECTION must be i