> > Given the table:
> > Person EyeColor
> > ------ --------------
> > Mary NOT_APPLICABLE
> > Bob NOT_APPLICABLE
> >
> > Then, Mary.EyeColor equals Bob.EyeColor
>
> No. You're free to define the domain and its operations as you wish.
One should define things according to reality otherwise one can get
results that are correct within the system but meaningless or
incorrect in reference to reality. For example, Newtonian will provide
answers that they don't match reality under some conditions. Same
thing occurs with RDM when working with NULLs or masks for those NULLs
(ie NA).
Received on Wed Mar 03 2004 - 19:41:57 CST
