Potentially (potentially doing a LOT of heavy lifting here) unethical, make a reasonably comfortable tiny person cell, take the mushrooms, put a tiny person in the cell. A second person who is completely unaware of the previous events takes the mushroom and we see if they can see the same tiny person still in the cell.
So that in the 1 in a however silly big number chance that they turn out to be real, they can’t run off between person 1 taking the mushrooms and person 2 taking the mushrooms. Thus producing a more objectively verifiable result.
Potentially (potentially doing a LOT of heavy lifting here) unethical, make a reasonably comfortable tiny person cell, take the mushrooms, put a tiny person in the cell. A second person who is completely unaware of the previous events takes the mushroom and we see if they can see the same tiny person still in the cell.
why does the tiny person need to be in a cell?
So that in the 1 in a however silly big number chance that they turn out to be real, they can’t run off between person 1 taking the mushrooms and person 2 taking the mushrooms. Thus producing a more objectively verifiable result.
Collect enough of them in their own cells and we can battle them like Pokemon!