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Re: [ontolog-forum] Ontology, Information Models and the 'Real World': C

To: "[ontolog-forum] " <ontolog-forum@xxxxxxxxxxxxxxxx>
From: Christopher Menzel <cmenzel@xxxxxxxx>
Date: Sun, 27 May 2007 16:05:12 -0500
Message-id: <26D8FA51-A9E2-48C0-9BFB-1897E6D291E1@xxxxxxxx>
On May 27, 2007, at 3:03 AM, Waclaw Kusnierczyk wrote:
> Pat Hayes wrote:
>>  take a look
>> http://www.ihmc.us:16080/users/phayes/context/ContextMereology.html
> There, you say:
> "the parthood relationship, which we will assume is transitive,
> asymmetric and reflexive"
> Can you give an example of a relation that is both asymmetric and
> reflexive (other than the vacuously asymmetric and reflexive empty
> relation)?    (01)

Clearly he means "antisymmetric", i.e.,    (02)

(if (and (R x y) (R y x))
     (= x y))    (03)

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