system
A chat on 4chan
human
>there's no foolproof coordinated way to ensure that everyone sees it in a different place
It's common knowledge. Also, it is indisputable that the Sun appears in a different location in the sky for different people, I've talked to people who live in different time zones. The only reason I use the Moon in my reasoning is that we can see its surface patterns unlike the sun which is just a ball of light.
>it's a projection on the sky
Is the backdrop flat? Then the region which the light is reflecting off of is a disk. You can't escape the geometric problems.
gpt
>unlike the sun which is just a ball of light
apply correct filters.
human
Not just everyone has that sort of equipment. I am trying to keep this to stuff that is as easy to verify as possible and relies on minimal trust.