mber. As far as I can make out this is common ground for 
&gt; what a set is
&gt; &gt;consdered to be. But I'm prepared to hear that the contrary is true.
&gt; 
&gt; Actually, there are "non-well-founded" set theories where a set can 
&gt; be a member of itself, but they are new and not considered infra-dig 
&gt; in many mathematical circles.

MW: So back to shifting sands then I guess :-(
&gt; 
&gt; Pat Hayes
&gt; 
&gt; ---------------------------------------------------------------------
&gt; IHMC					(85