Date: Tue, 08 Jul 2008 18:09:03 GMT
> Brian Selzer wrote: > ...
>> Consider the following statements:
>> 1. Susan is an electrical engineer.
>> 2. Susan is a mechanical engineer.
>> 3. Susan is an electrical engineer or Susan is a mechanical engineer.
I have another question. Suppose we have a database that involves only statement 3. Just what does its extension look like?
Eg., does it contain only one relation or several? If there is one relation, what is its extension? If there are several relations, are there an equal number of extensions? Received on Tue Jul 08 2008 - 13:09:03 CDT