High Quality Content by WIKIPEDIA articles! HYPO is a computer program that models reasoning with cases and hypotheticals in the legal domain. It is the first of its kind and the most sophisticated of the case-based legal reasoners, which was designed by Ashley for his Ph.D dissertation in 1987 at the University of Massachusetts Amherst under the supervision of Rissland. HYPO’s design represents a hybrid generalization/comparative evaluation method appropriate for a domain with a weak analytical theory and applies to tasks that rarely involve just one right answer. The domain covers US trade secret law, and is substantially a "common law" domain. Since the Anglo-American law is operated under the doctrine of precedent, the definitive way of interpreting problems is of necessity and case-based. Thus, HYPO did not involve the analysis of a Statute, as required by the PROLOG program. Rissland and Ashley (1987) envisioned HYPO as employing the key tasks performed by lawyers when analyzing...