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"These laws of nature appear fine-tuned to bring about life, and in particular, intelligent life." The "to" implies purpose, and there's no evidence of this.
by jamesrcole 8y ago
"These laws of nature appear fine-tuned to bring about life, and in particular, intelligent life."
The "to" implies purpose, and there's no evidence of this. That fact that we exist could only happen in a universe that we can exist in, but this says nothing about why the universe is like that.
"One answer to some of these questions is Platonism (or its cousin Realism). This is the belief that the laws of nature are objective and have always existed"
Platonism is a type of Realism
(https://en.wikipedia.org/wiki/Philosophical_realism https://en.wikipedia.org/wiki/Philosophical_realism)
And the idea that the laws of nature are objective and have always existed does not equate to Platonism. It doesn't mean they are therefore Platonic Forms https://en.wikipedia.org/wiki/Platonism https://en.wikipedia.org/wiki/Platonism
"The multiverse is another answer that has recently become quite fashionable. This theory is an attempt to explain why our universe has the life-giving laws that it does"
It's really misleading to present the multiverse notion as an attempt to explain a universe suitable for life.
There are many other reasons people have proposed it. For example, in the Many-worlds interpretation of Quantum Mechanics https://en.wikipedia.org/wiki/Many-worlds_interpretation https://en.wikipedia.org/wiki/Many-worlds_interpretation
"...while the multiverse would answer some of the questions we posed if it existed, who says it actually exists? Since most believe that we have no contact with possible other universes, the question of the existence of the multiverse is essentially metaphysics."
I think that's misleading - there are stronger theoretical grounds for hypothesising it than what this suggests. I'm not saying there's evidence for it, I'm saying that the quoted statement misleadingly makes it out be an empty speculation.
"Some people say that science studies all physical phenomena. This is simply not true. Who will win the next presidential election and move into the White House is a physical question that no hard scientists would venture to give an absolute prediction. Whether or not a computer will halt for a given input can be seen as a physical question and yet we learned from Alan Turing that this question cannot be answered. Scientists have classified the general textures and heights of different types of clouds, but, in general, are not at all interested in the exact shape of a cloud. Although the shape is a physical phenomenon, scientists don’t even attempt to study it. Science does not study all physical phenomena. Rather, science studies predictable physical phenomena. It is almost a tautology: science predicts predictable phenomena."
I don't agree with that characterisation. Just because it can't give complete predictions of phenomena does not justify saying it doesn't study those phenomena. Just because we can't predict halting doesn't mean we don't study halting at all. The fact that we know for certain that we can't predict halting demonstrates that we study, and have a certain level of understanding of, that phenomenon.
...and I've run out of time to read more of the article.
- ars 8y agoThe multiverse and the many worlds have nothing to do with each other. Multiverse postulates multiple universes with different laws of physics, while many worlds postulates worlds with the same laws, just different results for quantum events. You could even have many-worlds inside multiverse. And some multiverse's with and without many worlds.
- jamesrcole 8y ago> The multiverse and the many worlds have nothing to do with each other. Some examples "The theory is also referred to as MWI, the relative state formulation, ... multiverse theory or just many-worlds. [...] MWI is one of many multiverse hypotheses in physics and philosophy." https://en.wikipedia.org/wiki/Many-worlds_interpretation https://en.wikipedia.org/wiki/Many-worlds_interpretation For those who don't know, the Everett mentioned in the following is the person who came up with the Many Worlds view. "The Multiverse Interpretation of Quantum Mechanics", by Raphael Boussoa and Leonard Susskind Abstract: We argue that the many-worlds of quantum mechanics and the many worlds of the multiverse are the same thing, and that the multiverse is necessary to give exact operational meaning to probabilistic predictions from quantum mechanics. https://arxiv.org/pdf/1105.3796.pdf https://arxiv.org/pdf/1105.3796.pdf "Identity and probability in Everett's multiverse", by P Tappenden. The British Journal for the Philosophy of Science, Volume 51, Issue 1, 1 March 2000, Pages 99–114 https://doi.org/10.1093/bjps/51.1.99 https://doi.org/10.1093/bjps/51.1.99 "The Structure of the Multiverse", by David Deutsch 1. Introduction The idea that quantum theory is a true description of physical reality led Everett (1957) and many subsequent investigators (e.g. DeWitt and Graham 1973, Deutsch 1985, 1997) to explain quantum-mechanical phenomena in terms of the simultaneous existence of parallel universes or histories. https://xxx.lanl.gov/pdf/quant-ph/0104033 https://xxx.lanl.gov/pdf/quant-ph/0104033
- whatshisface 8y ago> The multiverse and the many worlds have nothing to do with each other. > (paraphrasing) The terms "multiverse" and "many worlds" are used interchangeably by many. You two aren't really disagreeing. The parent commenter was just highlighting that there are two totally separate concepts that are associated in public vernacular with a single word.