Have you ever been introduced to someone in an informal way only to later find out they were a judge? You had been calling him Robert, when you should have been calling him Judge Jones!
That will likely happen often when you go to law school. The person you’re meeting might be the dean, a visiting faculty member, or a sitting judge on campus to speak with a student group or class. In fact, many adjunct professors are actually sitting or retired judges – you never know who you might be interacting with!