Saturday evening connum, conund question.

I've heard one like this afore, but forgot which way you work it out.

A man meets two men at two doors.
The two doors are marked "Eternal bliss" and "Peril"
One of the men always tells the truth, one always tells lies.
What question do you ask to be certain you get to the room with eternal bliss?

Thanks in advance

 

btt

 

Hope this makes sense

"Would the other Guardian tell me that this is the door to eternal bliss?"

if he says no, then it is.
If he is telling the truth, then the other, (who says no) is lying, so this is the door.
If he lies,then the other one would say yes, and he is telling the truth.

Yes and it is the other one. Same works in reverse:
If tells the truth, then the other is lying, and this is not the door.
If he lies, then the other, which is telling the truth, would say that this is not the door.

 

Thanks buddy! Glad I read it afore I go out!