1. Re: 'Unknownn' and three valued logic
- Posted by Rom <kjehas at frisurf.no> Nov 29, 2002
- 454 views
"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