Britannica Sources used in this answer

How can judges distinguish an earlier precedent from a later case?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

King Henry II and St. Thomas Becket — Common law Henry II (left) disputing with Thomas Becket (center), miniature from a 14th-century manuscript; in the British Library (Cotton MS. Claudius D.ii).

In common law systems, judges distinguish an earlier precedent from a later case when they determine that the facts or issues of the current dispute are not substantially identical to those of the previous decision.12

While the principle of stare decisis generally requires courts to follow established rulings to ensure uniform and predictable justice, it is not a rigid rule of universal application. Judges exercise their discretion to identify "dissimilar factors" between the cases. By concluding that an earlier decision was based on a different set of circumstances, a judge can effectively set that precedent aside as inapplicable to the matter at hand.12

This process of distinguishing is a fundamental aspect of judicial lawmaking, allowing the law to evolve while maintaining the integrity of the legal system. It ensures that courts remain committed to the ethical principle of treating similar cases similarly, while avoiding the application of outdated or ill-suited rules to new, distinct situations.2