Re: So what's null then if it's not nothing?
From: Frank Hamersley <terabitemightbe_at_bigpond.com>
Date: Wed, 07 Dec 2005 14:24:52 GMT
Message-ID: <UgClf.13909$ea6.6355_at_news-server.bigpond.net.au>
>
> You don't answer my questions; you come up with complete non sequiturs.
> A domain has a name. The domain consisting of the values { TRUE, FALSE }
> is called Boolean. There is another domain, consisting of the values {
> TRUE, UNKNOWN, FALSE }, which I called "3VL Boolean".
Date: Wed, 07 Dec 2005 14:24:52 GMT
Message-ID: <UgClf.13909$ea6.6355_at_news-server.bigpond.net.au>
Jon Heggland wrote:
> In article <1133894046.516473.27860_at_f14g2000cwb.googlegroups.com>,
> boston103_at_hotmail.com says...
>
>>>>>What do you call the domain { TRUE, UNKNOWN, FALSE }? And by the way, >>>>>haven't you argued for ages that names don't matter? >>>> >>>>Names do not matter, but the number of logical constants does. If >>>>it's more than two, then the logic is most certainly not Boolean. >>> >>>You are quibbling. >> >>I beg your pardon ? The number of logical constants, not thir names, >>is what distinguishes propositional logic from various multivalued >>logics, including various breeds of 3VLs.
>
> You don't answer my questions; you come up with complete non sequiturs.
> A domain has a name. The domain consisting of the values { TRUE, FALSE }
> is called Boolean. There is another domain, consisting of the values {
> TRUE, UNKNOWN, FALSE }, which I called "3VL Boolean".
[..]
Personally I don't understand why NULL is so hard "to get". But then there are lots in IT who don't get it so I should expect this thread will rise again in about a years time (assuming it has died in the intervening period).
Frank. Received on Wed Dec 07 2005 - 15:24:52 CET