Are we even sure that Sisyphus can make it to either location? Because in order to reach a destination he must first make it to the halfway point, right? But to make it there, he’s gotta make it to that point’s halfway point, but before he gets there he need to…
He doesn’t actually have to make it there you just have to pull that lever with a force an omnipotent being would have trouble accomplishing
Instead, let’s aim for double the end location. Then all he has to do is travel half that distance
Dosen’t matters what you choose, given that for sisyphus to reach his destination first he have to reach half, then half of it, then half again and again making movement impossible.
Why are these the passengers
Yes, because he’s finally rolling the boulder down a hill.
Not necessarily downhill, but the possibility of downhill is implied. Both of these locations would need to be infinitely high in order for the direction to be uphill.