Time only goes one way

One Time Dimension

            I am still working my way through Our Mathematical  Universe, by Max Tegmark, and having a good time doing that.   The book describes the current thinking about the Big Bang, cosmic expansion, the size and shape of our universe, and the reasons that it has turned out to be that way.

            Now I am on the part were he begins to describe the possibilities of other kinds of  universes, places that should exist, according to the current theories, but we may never be able to actually verify.  But he gives some limitations to even the strangeness of these places, that are basic to their existence, at least in the way that we understand the word existence.

           

One of these limitations struck me as a very important consideration for those of us who have deal with and explain people’s psychological existence, and usefulness.   On location 2781 of the Kindle editions Dr. Tegmark  states that it necessary for the stability of any universe to have only three space dimensions, and only one time dimension.  “With more than three space dimensions there are no stable atoms or solar systems.  With fewer, there’s no gravitation attraction.”  Ok, fine, I got that. (If you don’t, you can work on that yourself).

            Then he goes on to say, and this is the important part for me: “With more or less than one time dimension,  physics loses all predictive power, and there would be no point in evolving a brain.”

            What he is saying here, and I really agree with,  is that the major reason we have a brain and gain all of our knowledge, is for predictive purposes.  Those of us who survive and thrive are those of us who are best at figuring out what will be happening next, and then also figuring out how to deal with that.

            I have read before, I am pretty sure it was from Daniel Dennett, but he may have been quoting someone else, that the only real measure of intelligence is the ability to anticipate.   To me that means that a great deal of the measures we have of “IQ” are only of things that are one or two steps away from the real skills necessary to survive and be successful. Yes, it is probably helpful to be good at math, to have an extensive vocabulary, and to be able to put puzzle pieces together, but if you can’t figure out which way the bus will be coming down the street before you step off the curb, all those other skills won’t help much.

            We learn from out experiences, how the world works, that is why each of use thinks things work slightly differently.  Smart people can anticipate what is coming next.  Really smart people think about what will happen after that.

            Dr. Tegmark points out that this is only true if you live in a universe in which time only moves in one direction.  If time jumps all around, from past to future, to past , to present. It is useless to try to make any predictions., so don’t even bother developing a brain.  Thankfully, we live in the right kind of universe.  I hope you all can learn to take advantage of that.