The FEEL type boolean (DMN 1.6, section 10.3.2.3.3).
Its values are true and false. Logic on booleans is three-valued: an
operand that is null or not a boolean can make a result null.
Summary
Types
@type t() :: boolean()
Functions
@spec type() :: Feel.Type.t()
Returns the type descriptor of boolean.
Returns true for true and false.