Examlex
There is never a good reason to use null values in a database.
Obverse
The counterpart or opposite in a relationship, often used in reference to geometric figures or logical propositions.
Proposition
A speech or affirmation that indicates an opinion or assessment, liable to be correct or incorrect.
Obverse
In logic, a method for transforming a proposition by negating both the predicate and the subject, and replacing the predicate with its complement.
Propositions
Declarations or claims that convey a belief or viewpoint, capable of being either correct or incorrect.
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Q99: A(n)_ relationship is also known as an