I have not read Tegmark's book but I wouldn't go as far as he does either (even though you could describe me as a Platonist of some sort). I think there are many kinds of realities and certainly one physical reality. Some mathematical physicists are so entangled with abstract mathematical ideas that are very important in describing nature that they push the to the extreme of believing as he does. But I don't need to go that far to accept the fact of how essential (maybe even fundamental) these abstract ideas are.
Posted May 19th, 2018
by The Fly