Re: It's just mathematical equivalency - @Mike Bell
"And finally, "we are simulations in a computer" is just an updated rewrite of the "God did it". Where did the computer come from? It implies an infinite regress - computers all the way down - just as the question "OK, where did God come from" results in gods all fhe way down. Bill Ockham pointed out the absurdity of this position around 700 years ago, but news travels slowly in some parts. Even now somewhere in the US a Creationist is putting forward the "7 proofs of the existence of God" while an exam question in the theology department of a proper university might be to take one of them and explain why it doesn't work."
If it is possible to create a simulation that's indistinguishable from reality, then it stands to reason that many such simulations will exist throughout space and time.
Therefore, the likelihood is that what we experience is in fact a simulation.