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Re: [ontolog-forum] The Relation Between Logic and Ontology in Metaphysi

To: "[ontolog-forum] " <ontolog-forum@xxxxxxxxxxxxxxxx>
From: Pat Hayes <phayes@xxxxxxx>
Date: Fri, 16 Mar 2007 11:46:37 -0500
Message-id: <p0623090ac2207a263e33@[10.100.0.26]>
>... one could adopt a description-logical style
>of expression and distinguish between mere
>logical predication (F a) and natural-kind as a
>special relation of class membership (Kind a F),
>perhaps with an axiom which relates natural kinds
>to their weaker (merely extensional) associated
>predications:
>
>(forall (x y)(if (Kind x y)((propertyOf x) y) )
>    (01)

Sorry, should be    (02)

(forall (x y)(if (Kind x y)((propertyOf y) x) )    (03)

Pat    (04)

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