Yet the equivalent theory and the injurious-reliance theory are even less adequate to explain the actual law. The equivalent theory must wrestle at the outset with the doctrine that inadequacy of consideration is immaterial so that the equivalency is often Pickwickian. Hegel could argue for it on the basis of the Roman _laesio enormis_. But when a court of equity is willing to uphold a sale of property worth $20,000 for $200, even a dogmatic fiction is strained. Moreover the catalogue of anomalies with which the bargain theory must wrestle contains more than one difficulty for the adherent of either theory. Stipulations in the course of litigation do not need equivalents nor do they need to be acted on in order to be enforceable. A release by mere acknowledgment, when good at all, needs no equivalent and need not be acted on. Waiver by a surety of the defense of release by giving time to the principal needs no element of consideration nor of estoppel. Defectively executed securities, settlements and advancements need no equivalent and need not be acted on in order to be reformed. Options under seal are held open in equity on the basis of the seal alone. A gratuitously declared trust creates an obligation cognizable in equity without more. In truth the situation in our law is becoming much the same as that in the maturity of Roman law and for the same reason. We have three main categories. First, there are formal contracts, including sealed instruments, recognizances, and the formal contracts of the law merchant, in which latter the form consists in the use of certain words, requirements as to sum certain, payment at all events, and certainty as to time. Second, there are the real contracts of debt and bailment. Third, there are simple contracts, without form and upon consideration. The latter is the growing category although the formal contracts of the law merchant have shown some power of growth and the business world has been trying to add thereto letters of credit using the formal words "confirmed" or "irrevocable." But the category of enforceable simple promises defies systematic treatment as obstinately as the actionable pacts in Roman law. Successive additions at different times in the endeavor of courts to hold men to their undertakings, in view of the social interest in the security of transactions and the jural postulates of the civilization of the day, proceed on all manner of different theories and different analogies and agree only in the result--that a man's word in the course of business should be as good as his bond and that his fellow men must be able to rely on the one equally with the other if our economic order is to function efficiently. It is evident that many courts consciously or subconsciously sympathize with Lord Dunedin's feeling that one can have no liking for a doctrine which enables a promisor to snap his fingers at a promise deliberately made, fair in itself, and in which