We have the constants true and false:
And connectors that, when combined with atomic propositions, constants or other connectors, form composite propositions:
When all children of the connector are connected, the connector assumes a value, according to its logical interpretation.
For example, an AND connective, connected with the exact same values that an OR connected takes, assumes a different value:
Some connectors take a single child as opposed to two:
A connector can also be used as child: