Gentlemen, if you don't know, why do you think Iona should?

There's a proverb that is, I think, Persian in origin that goes something like:

He who knows, and knows that he knows, he is a wise man, follow him.
He who knows not, and knows he knows not, he is a child, teach him.
He who knows, and knows not that he knows, he is asleep, wake him.
He who knows not and knows not he knows not, he is a fool, shun him.

It can be surprisingly difficult to distinguish the wise man and the fool in the proverb, and the best way of doing it is to see how they put together their solutions, propositions and arguments. The Socratic method is primarily to adopt the stance of the second line: I do not claim to know, you claim to know: show me why you are sure you know.

I have suggested that Iona tends to make some assertion, be challenged and then move onto something else without addressing the challenges. So I propose we concentrate on these mysterious underground chambers, and forget all the other issues until we have got to the bottom of this one. We all understand Iona believes in the Flood, but she proposed the link not as a defence of that belief, but as an explanation of where the water came from. So that's the challenge, really, Iona. Do you think the link is correct in claiming the waters came from these chambers? If so, it behoves you to answer Penny and Don about where they are. If, on the other hand you don't the link is correct on that matter, perhaps you will explain why you used the link in the first place.