--  TRUE and FALSE are the two constant values of True and False (1, 0 )
--  AND performs the logical AND between two conditions
--  OR performs the logical OR between two conditions
--  NOT performs logical negation
EVALUATE
    {
        ( "FALSE", FALSE ),
        ( "FALSE()", FALSE() ),
        ( "TRUE", TRUE ),
        ( "TRUE()", TRUE() ),
        ( "AND ( TRUE, FALSE )", AND ( TRUE, FALSE ) ),
        ( "OR ( TRUE, FALSE )", OR ( TRUE, FALSE ) ),
        ( "NOT ( TRUE )", NOT ( TRUE ) ),
        ( "NOT ( FALSE )", NOT ( FALSE ) )        
    }

--  The AND function can be replaced with the && operator
--  The OR function can be replaced with the || operator
EVALUATE
    {
        ( "AND ( TRUE, FALSE )", AND ( TRUE, FALSE ) ),
        ( "TRUE && FALSE", TRUE && FALSE ),
        ( "OR ( TRUE, FALSE )", OR ( TRUE, FALSE ) ),
        ( "TRUE || FALSE", TRUE || FALSE )
    }

--  Operators are more convenient when you need to combine
--  more than two conditions.
EVALUATE
    VAR A = TRUE
    VAR B = FALSE
    VAR C = TRUE
RETURN
    {
        ( "Using AND", AND ( A, AND ( B, C ) ) ),
        ( "Using &&",  A && B && C )
    }