Dear FQXi Friends,
I am concerned that some of you may think my essay is too complicated. This is a short explaination that I have reposted from James Putnam's blog area.
In my conclusion, I said "One version of Occam's razor says "Plurality ought never be posited without necessity."... Are Beauty and Symmetry necessary reasons to trump Simplicity? If Simplicity always trumps Necessity, then we should be satisfied with the "ugly but practical" Standard Model and a separate General Theory of Relativity, and we need to stop talking about such "foolishness" as Theories of Everything or Not Everything."
I know that my ideas look complicated, but I think it is analogous to finding the least common denominator (LCD) so that we can add fractions. If you wanted to add
[math]1/2 1/3 1/6
[/math]
you would find the LCD = 6, so that
[math]1/2 1/3 1/6=6/6=1
[/math]
and the apparently complicated is simplified. Likewise, if we want to unify the four known forces properly into one algebra, then that one algebra must be at least as large as the sum of its individual components. It looks more complicated because it is bigger and predicts new stuff, but the overall picture is simplified - the fundamental forces are placed on a compatible foundation.
Does a 12-dimensional model seem like "overkill"?Garrett Lisi's 8-dimensional E8 TOE seemed to be a reasonable approach, but Jacques Distler shot holes in it. If E8 isn't large enough, then we need to look for something larger. I have played with 8-, 10-, 12- and 14-dimensional models and the K12' presented in this essay is my favorite model.
Critiques are welcome!
Have Fun!
Ray Munroe