A more thorough explanation:

PROBUS ET LEGALIS HOMO

Probus et legalis homo means "a good and lawful man" in Law Latin. It was used to refer to a juror who was legally qualified to serve on a jury.

During the selection process for a jury, the judge may ask potential jurors if they are probi et legales homines.

Only probi et legales homines can serve on a jury.

These examples illustrate how the phrase was used to refer to someone who was legally competent to serve on a jury. It was important for jurors to be probi et legales homines to ensure a fair trial.