a Relationship between a Product and an Feature whereby the Product possesses a Feature which potentially Satisfies-Need of a Customer
(=> (Market-Need ?Need)
(Exists (?Customer)
(And (Customer ?Customer)
(Has-Need ?Customer ?Need)
(Not (Exists (?For-Sale ?Product ?Feature)
(And (Product-For-Sale ?For-Sale
?Product)
(Has-Feature ?Product ?Feature)
(Satisfies-Need ?Feature ?Need)))))))