What is the meaning of John Patrick Shanleys title Doubt, A parable?

Question:the play is set in a Catholic school in 1964 and a young priest teaches there and helps one young man in particular, but a nun who is older is suspicious of him and his relationship with the young man, has he hurt or molested the young man. Did he or didn't he that is the doubt.

Best Answer - Chosen by Asker: the play is set in a Catholic school in 1964 and a young priest teaches there and helps one young man in particular, but a nun who is older is suspicious of him and his relationship with the young man, has he hurt or molested the young man. Did he or didn't he that is the doubt.