The traditional style of doctrinal illustrations in the American Law Institute’s Restatements of Law identifies parties by meaningless letters such as A, B, C and D. In Contracts, at least, it would be clearer for the illustrations to identify parties by meaningful normative categories they occupy, such as General-Sub, Company-Inventor, Buyer-Seller, Borrower-Lender, Father-Daughter, or even Promisor-Promisee, Obligor-Obligee and so on.
Using meaningless letters adds unnecessary, if slight, cognitive demand to exercises that should be maximally parsimonious. Normative categories in Contracts are especially useful to emphasize the context in which an exchange occurs. The abstract lettering system should be abandoned in future Restatements. A few examples from Illustrations to Section 227 of the Restatement (Second) of Contracts appear below.