by moonlord » Mon Jul 17, 2006 5:27 pm
As Hawking says, it is a meaningless question. No one will ever know. It seems we have 3 spatial and a time-D, but theories require more. Now, if we have a theory that claims 5D and one that has 8D, and they are unified in a GUT that requires 10D (mathematically) what would you choose? In the positivistic approach, one can not know which is the real theory. "Perhaps the difference between what's real and what's not is merely in our head." (Hawking).
"God does not play dice." -- Albert Einstein, early 1900's.
"Not only does God play dice, but... he sometimes throws them where we cannot see them." -- Stephen Hawking, late 1900's.