Dev - Data Types - Bool
A binary value which can only be true or false. In Lua everything which isn't nil or false is false. Everything else is true. See: Lua documentation about booleans
When methods have bool parameters you can simply put a true or false keyword in the code. You can also put logical expressions in the code which will then be evaluated.
Bool Return Values
When a method returns a boolean value, it will be a Lua bool.