existing content can be changed to allow defining both old and new 
concepts.  We can hope that this latter necessity will become rare
as the SUO matures.


&gt; There isnt a single 
&gt; 'reasonably general and correct' ontology: there are many ontologies, 
&gt; all general and all with as valid a claim to be 'reasonable and 
&gt; correct' as all the others, but sharply incompatible with each other. 
&gt; Some ambitious folk want their ontology to include a distinct entity 
&gt; for every fact that can be 