Option number 5 is funny too...

...If you're willing to take the consequences.

Have you ever desired a save button, that you can press, see what happens if
you do something questionable, and then being able to reload the saved state
after you did it?

Unfortunatly by realoading the game you would revert the universe to the
moment you saved, so you would not recollect what happened after you saved.
You would still be curious about the consequences of your action, and try
again.  This would result into a never ending repetition of last time frame.
And nobody would ever realize what is going on.

In principle it *could* be that someone is using that button *right now*, and
that we are all, indeed, on the N-th iteration of the same time frame.
This could be happening with a probability that is extremely close to zero,
yet you can't prove me wrong.