This is one of the most common logic nodes, along with NOT and AND.

It outputs true if any of the inputs are true. If all of them are false, the node will output false.

This node is used in all modules.

Input #1 is a boolean value - a true or a false.
Input #2 is a boolean value - a true or a false.

Output #1 is will be true whenever either inputs 1 and 2 are true. It will only output false in the event that both inputs are false.

NOT
AND