You come to a fork in a road. One road leads you to heaven the other road leads to nowhere. The land is occupied my two tribes, truth tellers and liars. There are no physical characteristics distinguishing members of the tribes. There will be a member of one of the two tribes at the fork. You do not know if is a liar or truth teller. You can only ask one question to answer which road to take that wil lead to heaven. What is that question?

If it was me in this situation, I would think that even though there is  tribe that is  a truth teller they could still lie, but I would just ask them to point to the right way to heaven and hope that it is the right way)

Explanation:

i am a priest who cares deeply about the church. i have been called here to explain my views on indulgences and other proposed reforms. i would like to explain why my views are consistent with the bible and are correct.

answer; depression and breathing related sleep disorder(independent);