# Symbols:Symbolic Logic/Disjunction

## Disjunction

$\lor$

Or.

A binary operation on two propositions.

$P \lor Q$ means either $P$ is true or $Q$ is true, or both.

Its technical term is vel.

The $\LaTeX$ code for $P \lor Q$ is P \lor Q  or P \vee Q.

Some $\LaTeX$ compilers allow \or (the MathJax used on $\mathsf{Pr} \infty \mathsf{fWiki}$ does not).

In the context of propositional logic, on $\mathsf{Pr} \infty \mathsf{fWiki}$ \lor is standard.

## Deprecated Symbols

### Disjunction

$+$

Or.

A binary operation on two propositions.

$P + Q$ means either $P$ is true or $Q$ is true or both.

An alternative to $P \lor Q$, which is what is usually used by logicians.

The $\LaTeX$ code for $P + Q$ is P + Q .