[edit 10Sep2020 — following a comment by Russellings of the Spirit (below), I feel that I ought to point out that in order to make sense of my post here, you really do need to first watch this video clip. It is about a half hour in length, but it puts it all into context, and I promise you it’s worth it! ]
Extrapolating on ‘cogito, ergo sum’: I know I’m here, but I cannot prove that any of the rest of you exist. All that’s needed to simulate reality is to simulate a single consciousness, reducing the necessary computational power; so if simulated realities exist most of them will probably be of this type. And I could be in one, down in ‘the sewer’.
Now, I know I’m not smart enough to open door #3 myself. If one of you were to do this, this would make this reality ‘parous’, which (according to David Kipping) eliminates the null hypothesis, flipping the probabilities and making it almost certain that this reality is a simulation.
However, the fact that someone else had opened door #3 would prove that the reality I inhabit features at least one other consciousness (on the grounds that only a conscious entity could beget another one). And it would lend credence to the idea that the rest of you are actually conscious too. All nearly eight billion of you. And since a reality comprising so many conscious individuals would require so very much more computational power than a minimalist configuration comprising just a single consciousness, such a reality would be heavily weighted towards being the ‘base reality’.
So would someone please open door #3 for me and get me out of the sewer?