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Re: [ontolog-forum] Ontology and methodology

To: "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx>
From: andersen@xxxxxxxxxxxxxxxxx
Date: Mon, 19 Mar 2007 13:10:28 -0400 (EDT)
Message-id: <39508.>
Chris..    (01)

You're right.  Lots of think-o's in here.    (02)

>> (forall (A B)
>>   (if
>>     (and (class A) (class B))
>>     (iff
>>       (subclass A B)
>>       (and
>>         (Nec (forall (x) (if (A x) (B x))))
>>         (Nec (exists (x) (and (A x) (not (B x)))))
>>      ))))
> You've got A and B turned around in that last line,    (03)

I certainly do.  You're right.  Thanks.    (04)

>          (Poss (exists (x) (and (B x) (not (A x)))))    (05)

100% correct.  Thanks for catching my bugs.  I'm typing faster than I'm
thinking.  The intuition is that it has to be possible for there to be a
member of the superclass that is not a member of the subclass.    (06)

  .bill    (07)

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