ot classified in
&gt; &gt; either of these ways. (Note in particular that a set of physical
&gt; &gt; things is not itself physical.)
&gt; &gt;
&gt; &gt; Are you taking physical and abstract as two sides of the same
&gt; &gt; distinction
&gt; &gt; here - or are there more types. It also seems to me that the complete
&gt; &gt; banning of spatio-temporal location for sets can be
&gt; &gt; problematic if you want
&gt; &gt; to think of things such as groups (football teams, and so on)
&gt; &gt; as sets. Some
&g