[Theophylact]

What urban legends and movies did Reagan use as fact

Oh, too many to list them all, Epidemic, but here's some. His Chicago welfare queen. His wounded belly-gunner story. His notion of an impenetrable shield to protect the US from missiles. His "remembering" his role in liberating a Nazi concentration camp.

(Sorry these are all secondary sources; finding the original speeches and movie scripts would take me too long.)