I have a question

I saw this somewhere and I'm curious to hear more answers.
Let's say someone give you a box. Inside that box is the true answer to the question if god is real or not. Only the truth, there's no doubt. The answer can be Yes or No.
You have the right to open that box, do you open it? knowing that what's inside may be contradicting your belief?
It doesn't matter if you are religious or not, doesn't matter what religion you're part of.
(example: You don't believe in God, but in the box is the undeniable truth that he is real)
Would you open it? why?