Methods

`ToString`	Returns a string representation (`"true"` or `"false"`).
`Then t`	Calls `t` if the boolean is true and returns it's value, or `()` if the boolean is false.
`Else e`	Calls `e` if the boolean is false and returns it's value, or `()` if the boolean is true.
`ThenElse t e`	Calls `t` if the boolean is true, or `e` if it's false. The result of the called function is returned.
`AndThen f`	Returns false without calling `f` if the boolean is false, otherwise returns the truth value of calling f.
`OrElse f`	Returns true without calling `f` if the boolean is true, otherwise returns the truth value of calling f.
`And b`	Returns true if this boolean is true and `b` is true, otherwise false.
`Or b`	Returns true if this boolean is true, `b` is true or both, otherwise false.
`Xor b`	Returns true if this boolean is true or `b` is true, but not both.
`Not`	Returns true if the boolean is false, otherwise it returns true.
`Equal other`	Returns true if the `other` value is a boolean and they're both true or both false.