A more thorough explanation:

The writ of coram nobis is a legal term used in common law to bring to the court's attention certain facts that were not known to the court at the time of judgment and could have changed the outcome of the case. This writ is used to correct a final judgment by the same court in which it was rendered by addressing a fundamental error.

For example, if a person was convicted of a crime without being given the right to an attorney, they could file a writ of coram nobis to bring this fact to the court's attention. The court could then review the case and potentially overturn the conviction.

Another example could be if new evidence is discovered after a trial that could have changed the outcome of the case. The writ of coram nobis could be used to bring this evidence to the court's attention and potentially overturn the previous judgment.

In summary, the writ of coram nobis is a legal tool used to correct fundamental errors in a final judgment by bringing new facts to the court's attention that were not known at the time of the original judgment.