Another idea for testing the external existence of DMT entities.

(Disclaimer: I haven't tripped on DMT yet. YET. Soon..) There was one blogger talking about testing the existence of DMT entities by trying to ask them questions of a mathematical nature: factorization of large numbers similar to cryptography. I don't know if anyone has tried that yet, but I had another idea.

What if instead we asked for information from another tripper? Like, 2 people trip together, and each has a certain memory in mind, and they ask the DMT entities what the other's memory is?

I know McKenna said asking them questions is pointless, and that is what I expect the result to be if they are (as I suspect) manifestations of our own ego, but no reason not to try.