(June 22, 2014 at 9:04 am)whateverist Wrote:(June 20, 2014 at 12:22 pm)Surgenator Wrote: To suggest there exist something else is unfounded. The popular multiverse theory is motivated by m-theory (string theory v2.0), which has NOT been tested. It's just spectulation based on mathematical metaphysics.
Sounds like cosmological solipsism. We can (apparently) only directly perceive our own universe. Therefore 'others' are speculative. Absolutely right about it being speculation. But any answer to the question of whether the universe we can experience is all there can be is equally speculation.
You're correct about us can only directly precieve our own universe. There are two ways we can know if a multiple universes exist. 1) Another universe collides with ours. 2) We have a nearly accurate description of our universe to be able to infer the existence of other universes.
M-theory has not been tested, and I don't consider it valid until it has. M-theory is popular amounts theoretical physicist because of it's mathematical simplicity and complex behaviors that can arise. One of the simpliest test that can be done is a test for extra dimensions. So far no luck.
