A more thorough explanation:

Definition: A common lawyer is a type of lawyer who practices common law, which is a legal system based on judicial decisions and precedents rather than on written laws or statutes. Common lawyers rely on past cases and legal principles to guide their arguments and decisions.

Example: A common lawyer might argue that a particular case should be decided in a certain way because of similar cases that have been decided in the past. They might also rely on legal principles such as the presumption of innocence or the right to a fair trial.

Another example: A common lawyer might represent a client in a dispute over property rights. They would research past cases and legal principles related to property law to build their case and argue for their client's rights.

These examples illustrate how common lawyers use past cases and legal principles to guide their arguments and decisions. They rely on the precedent set by previous cases to make their case and argue for their client's rights.