Is it possible that we're living in a simulation?
There are several interpretations of that. Some people think that reality may be a simulation, like in The Matrix. I don’t think so.
First of all, using Newton’s laws, and assuming that the atmosphere is composed of tiny little marbles instead of atoms, the world’s largest computer could not simulate the atmosphere. It’s too complicated. The smallest object that can simulate the weather is the weather itself. Therefore weather is ‘unsimulatable’, as it has too many particles.
Quantum mechanics makes it incidentally worse, because now, instead we have billiard balls representing atoms. Atoms can also spin up, spin down and spin sidewards simultaneously. So it becomes a nightmare trying to simulate quantum mechanics and the motion of particles.
Therefore I do not believe that we are in a simulation. I don’t think there is a super CD-ROM where if you push the play button then here we are having this conversation. I think quantum mechanics is simply too complex, with too many possibilities, so that reality can be reduced to a CD-ROM and somebody hit our play button.
If you believe that the galaxy is teeming with Earthlike extrasolar planets, then you have to ask a very valid question: could there be intelligent life? In this case, why don’t they visit us? Why don’t they land on the White House lawn and give us the...