Based on Act One, Scenes 1, 4, and 5
Reportedly, both Hamlet and his good friend Horatio attend the University of Wittenberg. The renowned reformer (or notorious heretic, depending on your religious affiliation) Martin Luther was a professor at the University of Wittenberg.
Considering that the Protestant faith in the form of the Anglican Church was carved in the national psyche of the English, Hamlet's encounter with the ghost of his late father is particularly disconcerting to the Elizabethan audience. Hamlet himself is also facing the anathema of his academic conviction--the ghost and the purgatory are Catholic concepts.
Do you think Hamlet the younger has to take the Ghost's words at face value and run to avenge his father? If not, what do you think Hamlet needs to verify before carrying out the vengeance?