&gt; &gt;
&gt; &gt; &gt; Oh, come on Ian!  All the mereotopology, all the 
&gt; time-interval theory
&gt; &gt; &gt; and all the 'holes'; the continuant/occurrent 
&gt; distinction; Virtually
&gt; &gt; &gt; any concept that refers to 'ordinary things' (which is a 
&gt; loose phrase
&gt; &gt; &gt; for 'continuant' here). Almost the entire upper 
&gt; classification will
&gt; &gt; &gt; have to be re-done.  Might be worth trying it, though. If 
&gt; I  had any
&gt; &gt; &gt; spare time I wouldnt mind having a g