junkyardgod

All indications, to the best of my knowledge, and I am a diletant at best, are that we exist in a space/time universe. there may be other universes, but since we can not access them, I think they are immaterial.

As far as the nature of time, I think that the second law drives the perseptions of limited creatures in a single direction. An expanding universe, the only one we have at the moment, drives the rest of craetion in the same direction. i think time, in isolation, is a vector quantity, in that, its direction is constant, but its rate is dependant on conditons of the "clock" being used.

If this were not true, obviously, determinism would have no meaning. Don't like the roll of dice, go back and roll again. It dosen't seem to work like that.

jyg

Answerer

I know that there are six main problems in the Many World Interpretation, but I can't really recalled what are they(need to search for them again). One of the problems got something to do with the theory's assumption that there is a overall large 'superposition' wavefunction of the universe or multiverse, which no one really believe it existed. Just imagine we don't even know whether there is a wavefunction for our planet Earth.

malpensante

the wave form superposition is a problem of the copenhagen interpretation, and is one of the prominent things the many worlds interpretation solves. it is about the question of what happens to the parts of the wave form that don't collapse, and why they don't collapse. the answer in many worlds is that they do collapse, but we can perceive the collapsing from only one of the universes, whereas other counterparts of ourselves in other universes will watch different collapsings of different parts of the wave function, and all of it collapses in parts in different universes, or something like that.

we do have access to the other universes, indirectly, through interference phenomena in this universe's matter, which shows that they are material.