Re: A Logical Model for Lists as Relations
Date: Thu, 11 May 2006 15:18:26 +0300
Message-ID: <e3v9uo$30q$1_at_emma.aioe.org>
"David Cressey" <dcressey_at_verizon.net> wrote in message
news:iQF8g.6198$re6.4713_at_trndny04...
>
> "Jay Dee" <ais01479_at_aeneas.net> wrote in message
> news:Tjx8g.34028$P2.3888_at_tornado.ohiordc.rr.com...
> > > If one has a numeric index that differs for each tuple, one never has
> > > duplication. If one has duplication, one wonders how to refer to the
> > > duplicates. As Codd observed long ago, once one has said a thing is
> > > true, what does saying it again achieve?
> >
> > Yes, I agree. If one were, for example, compiling a list of what
> > folks were going to bring to the picnic, it might be nice to know
> > that potato salad had been recorded many more times than fried
> > chicken...
> That's counting, not asserting. Asserting something twice is no more
> consequential than asserting it once.
The assertion depend on when, where, who, ... made it. :-) Received on Thu May 11 2006 - 14:18:26 CEST