Oops and sorry. I got W's original mail through the OBO rel weblist. I
didn't want to spam on the ontolog forum.
Please accept my apologies. (01)
from [Ryan Kohl] [Permanent Link][Original] (03)
To: "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx>
From: Ryan Kohl <kohl@xxxxxxxxxxxxxxxxx>
Date: Fri, 02 May 2008 15:59:13 -0400
Message-id: <481B7291.4000806@xxxxxxxxxxxxxxxxx> (04)
Why wouldn't 'married man' be a universal? By most standard ontological
definitions, a universal is something that can be instantiated by more
than one thing (e.g. http://plato.stanford.edu/entries/properties/).
Even under Barry Smith and Pierre Grenon's definition (from
http://ontology.buffalo.edu/bfo/SQU.pdf), a universal "is an entity with
a spatiotemporal existence which is yet distinct from its extension (the
set of its instances) at any given time." (page 1, 2nd paragraph). What
am I missing here? (01) (05)
> BFO and OBO aim for representation that is faithful to reality, not for
> computational efficiency or "easyness" of reasoning.
> BFO for sure, and good OBO ontologies (there are not many yet) represent
> universals. The monohierarchy applies to universals. "married man" does
> not denote a universal, so would never be present in a good OBO ontology.
> If there are places in OBO ontologies where the priority of distinction is
> an issue, then that probably is a place where some mistake against the
> "only universals" rule is made. Better to correct such mistakes, than to
> relax the principles.
> If you want to have "married man" in some application ontology (in
> contrast to reference ontologies as BFO and what OBO ontologies ought to
> be), then it could go there as a defined class, defined on the basis of
> the universals "man" and "marriage".
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