Zardnaar
Legend
Which in and of itself is dumb. Even among humans, 20 years isn't enough for most of the race to die out, let alone forget something that was common knowledge. And then there are the myriad of races that live even longer. Almost everyone would still know what a Jedi was, propaganda or no.
Up to a point. Know much about the Navy Seals? Jedi are rarer than them. There's something like 1 Jedi for every 100 worlds in the empire.
They're the equivalent of historical Jesus.