(<=> (Many-Many ?R)
(And (Binary-Relation ?R)
(Not (Function ?R))
(Not (Function (Inverse ?R)))))
(Not (Function (Inverse ?R))) (Not (Function ?R)) (Binary-Relation ?R)
(<=> (Many-Many ?R)
(And (Binary-Relation ?R)
(Not (Function ?R))
(Not (Function (Inverse ?R)))))