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Re: [ontolog-forum] what is a proposition?

To: Waclaw Kusnierczyk <Waclaw.Marcin.Kusnierczyk@xxxxxxxxxxx>
Cc: "[ontolog-forum]" <ontolog-forum@xxxxxxxxxxxxxxxx>
From: Pat Hayes <phayes@xxxxxxx>
Date: Sat, 26 May 2007 22:38:06 -0700
Message-id: <p06230919c27ec96596da@[192.168.1.4]>
>Pat Hayes wrote:
>>  For details see
>>  http://www.ihmc.us:16080/users/phayes/IKL/SPEC/SPEC.html
>>  and the 'guide' linked from there.
>
>In the guide, app. A, the axiom for extensional equivalence is not correct:
>
>(forall (x y)(iff
>    (equivalentRelation x y)
>    (forall (...)(and (iff (x ...)(y ...)))
>))
>
>The 'and' seems spurious to me.  (And the parentheses do not match.)    (01)

Yes, you are right. That seems to be a careless edit. Obviously it should read    (02)

>(forall (x y)(iff
>    (equivalentRelation x y)
>    (forall (...)(iff (x ...)(y ...)))
>))    (03)

Thanks for catching that.    (04)

Pat    (05)


>
>vQ
>
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