function (run rules) [flour sugar apples] (> (apple cake)) (run rules) end function (run rules) [apples oranges cherries] (> (fruit salad)) (run rules) end function (run rules) [(fruit salad) (apple cake)] (> (fruit cake)) (run rules) end function (run rules) [] end (> sugar) (> oranges) (> apples) (> cherries) (> flour) (> apples) (run rules)