1. Re: 'Unknownn' and three valued logic
"anything else than T/F becomes too complicated"
Being very practical...if you have visitors to your website... the =
visitor may be:
1) a registered user .. or not
2) male/female
3) an adult .. or not
4) may have an email adress
Is it right to say that when you don't know anything here, then default =
value
should be:
"an unregistered, adult male with no email address"
(Visitor may already be a registered user! Email =3D "" does not have to =
mean visitor has no email address, often expressed by nospam at please.com! =
Visitor does not have to be a male? He(she) does not have to be adult!)
The subject here is a large programmer's discussion where everyone has =
an opinion (so far 7 contra and 3 pro). Any language compiler has to =
deal with unsolvable syntax all the time (meaning is undefined (nil) =
=3D> syntax error), and make logic for variables without values =
(linking/binding).
Then these problems are defined away by the compiler, so that the =
programmer is not supposed to deal with these issues (programmers get =
less options.... less power?....) ...
I am not allowed to continue this discussion here. It may be that when a =
discussion in a mailist causes 30+ messages... that will be multiplied =
by a factor of 250, then the sheer number of mails causes the same =
inconviences as spam mail.
Regards
Rom
