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Gravity: It isn’t just a good idea. It’s the law.

Willamena

Just me
Premium Member
Dr. Tegmark maintains that we are part of a mathematical structure, albeit one gorgeously more complicated than a hexagon, a multiplication table or even the multidimensional symmetries that describe modern particle physics. Other mathematical structures, he predicts, exist as their own universes in a sort of cosmic Pythagorean democracy, although not all of them would necessarily prove to be as rich as our own.
“Everything in our world is purely mathematical — including you,” he wrote in New Scientist.
This would explain why math works so well in describing the cosmos...
I have to admit, I never quite understood this idea, even when brought up previously. What does it mean (to the mathematician or Pythagorean) that "we are part of a mathematical structure"?

Also, isn't the last sentence just a rehash of the Creationists' "the world is made perfectly for us"? What is the difference between "explains why math works so well" and "the world is made perfect for us"?
 

Jayhawker Soule

-- untitled --
Premium Member
From the article ...
When I was young and still had all my brain cells I was a bridge fan, and one hand I once read about in the newspaper bridge column has stuck with me as a good metaphor for the plight of the scientist, or of the citizen cosmologist. The winning bidder had overbid his hand. When the dummy cards were laid, he realized that his only chance of making his contract was if his opponents’ cards were distributed just so.

He could have played defensively, to minimize his losses. Instead he played as if the cards were where they had to be. And he won.

We don’t know, and might never know, if science has overbid its hand. When in doubt, confronted with the complexities of the world, scientists have no choice but to play their cards as if they can win, as if the universe is indeed comprehensible. That is what they have been doing for more than 2,000 years, and they are still winning.​
Winning is suggestive ...
 

sandandfoam

Veteran Member
Good post. Very interesting article.
I agree with Dr.Davies that both science and religion rest on faith. I'm not sure I agree with him that there are no timeless laws or truths. I do think that "Any physical theory is always provisional". That it is provisional because it cannot be proved doesn't detract from the 'truth' it may represent?
Anton Zeilingers speculation that reality is composed of information seems like a modern expression of the idea that God is in everything, an idea that I would agree with but perhaps I misunderstand what he is saying.
I also wondered in the final paragraph where the author says that scientists have no choice but to play their hand as if the world was 'comprehensible' would it be better if he had used the word predictable?
 

Jayhawker Soule

-- untitled --
Premium Member
I also wondered in the final paragraph where the author says that scientists have no choice but to play their hand as if the world was 'comprehensible' would it be better if he had used the word predictable?
Prediction is evidence of comprehension ...
 

tomspug

Absorbant
Prediction is evidence of comprehension ...

That's so false. Anyone can make a prediction! I think it's more true to say that prediction is evidence of PERCEPTION of comprehension. Just because someone believes something to be doesn't make it anything.

Otherwise, any kook on the street that predicts some god-awful damnation tomorrow would make (gullible) people stop and take notice and say, 'Hey, he probably knows something I don't.'
 

Willamena

Just me
Premium Member
That's so false. Anyone can make a prediction! I think it's more true to say that prediction is evidence of PERCEPTION of comprehension. Just because someone believes something to be doesn't make it anything.
I think you misunderstand. In order to make a useful prediction about something you have understanding supporting it. If you know what you're talking about, you can make good predictions. You have to comprehend the laws of gravity, for instance, in order to make a prediction that falls within those laws. If you don't understand the mathematical equations, you are not going to be able to utilize them to predict; or more simply if you don't understand the cause-and-effect of "what goes up must come down," you are not going to be able to utilize that to predict that something will fall. Good prediction evidences comprehension.
 

sandandfoam

Veteran Member
Prediction is evidence of comprehension ...

Yes it is, but say in terms of quantum mechanics (about which I know very little), we may be able to comprehend something without being able to predict it and I wonder will this apply to a unified theory if such a theory ever emerges?
 

Willamena

Just me
Premium Member
...we may be able to comprehend something without being able to predict it...
The phrase does not refer to predicting what we comprehend, but basing predictions on our comprehension. That we can predict evidences that we comprehend.
 
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