1. Re: 'Unknown' and three-valued logic
Rom wrote:
<snip>
> I posted the example below two weeks ago(?) here (what none except
> the most talented programmers can solve) as something that requires
> three-valued logic.
>
> Do you agree? (I already feel I was right i my assupmtion)
>
> Rom
<snip>
I think in the meantime David has clearly pointed out, that three-valued
logic is not *required*. IMHO it's just another way of handling data.
In one case, approach A may be more appropriate or elegant for handling
your data properly, and in another case approach B may be more
appropriate.
On the most basic level (at least concerning the standard computers that
we have on our desktiops), any information is expressed as sequence of
bits, and a bit is a 'two-valued variable'. So maybe three-valued logic
can be considered as just a special level of abstraction.
Regards,
Juergen
