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[ontolog-forum] The class of the planet Venus

To: ontolog-forum@xxxxxxxxxxxxxxxx
From: cassidy@xxxxxxxxx
Date: Tue, 10 Jul 2012 18:25:05 -0400
Message-id: <20120710222505.32494.qmail@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Wandering far off topic, ergo changing the topic from 'Truth':    (01)

A comment on the comment of Doug F.:
>> However, one would stretch to come up with what
>"an instance of the
>> planet Venus" would be.    (02)

This touches on an ontological issue that concerns me for several reasons: 
possible worlds.    (03)

Consider the planet Venus in each of the Sci-Fi novels in which the planet is 
described - it can have different properties, therefore is in fact a different 
Likewise if we live in a multiverse that forks for each collapse of an 
entangled quantum system (lots of 'em!).    (04)

So one can have 'ThePlanetVenusInAnyPossibleWorld' as a class.  If each 
ontology is restricted to one possible world, then Venus would be an individual 
in that world (I think) but in general ... ?    (05)

How does Cyc represent such a class?    (06)

Pat    (07)

Patrick Cassidy
908-561-3416    (08)

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