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)))))))