An identifiable Need of a Customer which is not fully satisfied by Product s currently For-Sale
(=> (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)))))))