Re: Guessing?

From: paul c <toledobysea_at_ac.ooyah>
Date: Tue, 08 Jul 2008 14:58:35 GMT
Message-ID: <vgLck.64535$Jx.48482_at_pd7urf1no>

Brian Selzer wrote:
> "paul c" <toledobysea_at_ac.ooyah> wrote in message ...
>> However, I'm content to say that all three relations have the same
>> predicate, assuming no attribute renaming is involved in your
>> interpretation. I know many people say that the 'or' is introduced to the
>> predicate of R. I don't believe there is any law or principle, including
>> relational closure, that requires anybody to think this way.

> How can they have the same predicate if they can have different extensions? 
> That doesn't make any sense.
> ...

They are misconceived. The example strikes me as akin to Joe C's word games. Received on Tue Jul 08 2008 - 16:58:35 CEST

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