Category:Propositional Logic

Propositional logic is a sub-branch of symbolic logic in which the truth values of statement forms is investigated and analysed.

The atoms of propositional logic are simple statements.

As "propositional logic" is such a mouthful and takes so long to write, some authors succumb to the temptation to abbreviate it by referring to it consistently as "PropLog".

It is also referred to as zeroth order logic (where first order logic is predicate logic).

There are various systems of propositional logic for determining the truth value of statement forms.


 * Natural deduction is a technique for deducing valid sequents from other valid sequents by applying precisely defined proof rules, each of which themselves are either "self-evident" axioms or themselves derived from other valid sequents.