Given the task definition and input, reply with output. Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

In common law legal systems, a precedent or authority is a legal case establishing a principle or rule that a court or other judicial body utilizes when deciding subsequent cases with similar issues or facts.

A precedent is a legal case establishing a rule. A new court uses that case to decide other cases with similar issues or facts.