The original problem was just two guardians, one who lied and one who told the truth. The trick would be to ask them "Which path would the other one say to take?" The one who lies will lie about what the truthful one would say (telling you the wrong path) and the one who tells the truth will honestly tell you about what the lying one would say (telling you the wrong path). Then you just take the other path.
However, with this third uncaring 50/50 guardian, I can't think of a single question that would be able to solve this. Either multiple questions or being able to ask more than one guardian a question would be required to solve this problem from my understanding.
I said it before, and I'll say it again. If I knew scripture like you, I'd prolly be an athiest too.. -gut
/l、
(゚、 。 7
l、 ~ヽ
じしf_, )ノ