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Parallel universes TESTED?

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What? From The Conversation:

The universes predicted by string theory and inflation live in the same physical space (unlike the many universes of quantum mechanics which live in a mathematical space), they can overlap or collide. Indeed, they inevitably must collide, leaving possible signatures in the cosmic sky which we can try to search for.

The exact details of the signatures depends intimately on the models – ranging from cold or hot spots in the cosmic microwave background to anomalous voids in the distribution of galaxies. Nevertheless, since collisions with other universes must occur in a particular direction, a general expectation is that any signatures will break the uniformity of our observable universe.

These signatures are actively being pursued by scientists. …

But why test it? Can’t they just get it accepted the way Darwinism is accepted, as the only thesis that can possibly be true? Force the rest of us to fund it?

As Richard Dawkins put it (p. 287, Blind Watchmaker, 1986): “My argument will be that Darwinism is the only known theory that is in principle capable of explaining certain aspects of life. If I am right it means that, even if there were no actual evidence in favour of the Darwinian theory (there is, of course) we should still be justified in preferring it over all rival theories.”

What can mere evidence offer, compared to that?

See also: Brit mid-market tabloid says Large Hadron Collider within days of discovering parallel universe

Scientific American tells us we may live in the past of a parallel universe

and why this is supposed to be science.

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3 Replies to “Parallel universes TESTED?

  1. 1
    bornagain77 says:

    a few related notes:

    This Week’s Hype – August 2011
    Excerpt: ‘It’s well-known that one can find Stephen Hawking’s initials, and just about any other pattern one can think of somewhere in the CMB data.,, So, the bottom line is that they see nothing, but a press release has been issued about how wonderful it is that they have looked for evidence of a Multiverse, without mentioning that they found nothing.’
    – Peter Woit PhD.
    http://www.math.columbia.edu/~.....ss/?p=3879

    Not Even Wrong: The Failure of String Theory and the Search for Unity in Physical Law:
    Peter Woit, a PhD. in theoretical physics and a lecturer in mathematics at Columbia, points out—again and again—that string theory, despite its two decades of dominance, is just a hunch aspiring to be a theory. It hasn’t predicted anything, as theories are required to do, and its practitioners have become so desperate, says Woit, that they’re willing to redefine what doing science means in order to justify their labors.
    http://www.amazon.com/Not-Even.....0465092756

    String Theory Fails Another Test, the “Supertest” – December 2010
    Excerpt: It looks like string theory has failed the “supertest”. If you believe that string theory “predicts” low-energy supersymmetry, this is a serious failure.
    http://www.math.columbia.edu/~.....ss/?p=3338

    “string theory, while dazzling, has outrun any conceivable experiment that could verify it—there’s zero proof that it describes how nature works.”
    Woit
    http://www.uncommondescent.com.....verify-it/

    String theory landscape picture is an extremely ill-defined conjectural – Oct 25, 2014
    “Are there any plausible alternatives to string/M-theory as a fundamental theory of physics?
    Does string theory make any cosmological predictions? Does it exclude anything?
    As far as I can tell, there’s an odd consensus set of answers to these two questions among string theorists. No, string theory makes no predictions about cosmology, but also no, there are no alternatives.”
    Peter Woit, Professor at Colombia University:
    http://www.uncommondescent.com.....njectural/

    A Capella Science – Bohemian Gravity! – video
    https://www.youtube.com/watch?v=2rjbtsX7twc

    “there’s a large contingent of physicists who believe that string theory is the heroin of theoretical physics. It has absorbed not just millions of dollars, but hundreds if not thousands of grad student lifetimes without delivering what it promised–a unified theory of the universe and life. It is hard, in fact, to find a single contribution from string theory despite 25 years of intense effort by thousands of the very brightest and best minds our society can find.,,
    This negative result is remarkable, and says something that no one wants to hear–that materialism as a philosophy of science, is spent, is toast, is worthless.”
    Rob Sheldon – Bohemian Gravity – September 19, 2013

    The part of the book (‘The Trouble With Physics’) I found most interesting was the part which tells how the string theorists were scammed by Nature (or Mathematics). Of course, Smolin doesn’t put it exactly like this, but imagine the following conversation.———
    String theorists: We’ve got the Standard Model, and it works great, but it doesn’t include gravity, and it doesn’t explain lots of other stuff, like why all the elementary particles have the masses they do. We need a new, broader theory.
    Nature: Here’s a great new theory I can sell you. It combines quantum field theory and gravity, and there’s only one adjustable parameter in it, so all you have to do is find the right value of that parameter, and the Standard Model will pop right out.
    String theorists: We’ll take it.
    String theorists (some time later): Wait a minute, Nature, our new theory won’t fit into our driveway. String theory has ten dimensions, and our driveway only has four.
    Nature: I can sell you a Calabi-Yau manifold. These are really neat gadgets, and they’ll fold up string theory into four dimensions, no problem.
    String theorists: We’ll take one of those as well, please.
    Nature: Happy to help.
    String theorists (some time later): Wait a minute, Nature, there’s too many different ways to fold our Calabi-Yao manifold up. And it keeps trying to come unfolded. And string theory is only compatible with a negative cosmological constant, and we own a positive one.
    Nature: No problem. Just let me tie this Calabi-Yao manifold up with some strings and branes, and maybe a little duct tape, and you’ll be all set.
    String theorists: But our beautiful new theory is so ugly now!
    Nature: Ah! But the Anthropic Principle says that all the best theories are ugly.
    String theorists: It does?
    Nature: It does. And once you make it the fashion to be ugly, you’ll ensure that other theories will never beat you in beauty contests.
    String theorists: Hooray! Hooray! Look at our beautiful new theory.
    ———- Okay, I’ve taken a few liberties here. But according to Smolin’s book, string theory did start out looking like a very promising theory. And, like a scam, as it looks less and less promising, it’s hard to resist the temptation to throw good money (or research) after bad in the hope of getting something back for your effort.
    – Amazon Review

    ‘it is clear that the string landscape hypothesis is a highly speculative construction built on shaky assumptions and,,, requires meta-level fine-tuning itself.”
    – Bruce Gordon

    Cosmic inflation is dead, long live cosmic inflation – 25 September 2014
    Excerpt: (Inflation) theory, the most widely held of cosmological ideas about the growth of our universe after the big bang, explains a number of mysteries, including why the universe is surprisingly flat and so smoothly distributed, or homogeneous.,,,
    Paul Steinhardt of Princeton University, who helped develop inflationary theory but is now scathing of it, says this is potentially a blow for the theory, but that it pales in significance with inflation’s other problems.
    Meet the multiverse
    Steinhardt says the idea that inflationary theory produces any observable predictions at all – even those potentially tested by BICEP2 – is based on a simplification of the theory that simply does not hold true.
    “The deeper problem is that once inflation starts, it doesn’t end the way these simplistic calculations suggest,” he says. “Instead, due to quantum physics it leads to a multiverse where the universe breaks up into an infinite number of patches. The patches explore all conceivable properties as you go from patch to patch. So that means it doesn’t make any sense to say what inflation predicts, except to say it predicts everything. If it’s physically possible, then it happens in the multiverse someplace
    Steinhardt says the point of inflation was to explain a remarkably simple universe. “So the last thing in the world you should be doing is introducing a multiverse of possibilities to explain such a simple thing,” he says. “I think it’s telling us in the clearest possible terms that we should be able to understand this and when we understand it it’s going to come in a model that is extremely simple and compelling. And we thought inflation was it – but it isn’t.”
    http://www.newscientist.com/ar.....CajrGl0y00

    A Matter of Considerable Gravity: On the Purported Detection of Gravitational Waves and Cosmic Inflation – Bruce Gordon – April 4, 2014
    Excerpt: Thirdly, at least two paradoxes result from the inflationary multiverse proposal that suggest our place in such a multiverse must be very special: the “Boltzmann Brain Paradox” and the “Youngness Paradox.” In brief, if the inflationary mechanism is autonomously operative in a way that generates a multiverse, then with probability indistinguishable from one (i.e., virtual necessity) the typical observer in such a multiverse is an evanescent thermal fluctuation with memories of a past that never existed (a Boltzmann brain) rather than an observer of the sort we take ourselves to be. Alternatively, by a second measure, post-inflationary universes should overwhelmingly have just been formed, which means that our existence in an old universe like our own has a probability that is effectively zero (i.e., it’s nigh impossible). So if our universe existed as part of such a multiverse, it would not be at all typical, but rather infinitely improbable (fine-tuned) with respect to its age and compatibility with stable life-forms.
    http://www.evolutionnews.org/2.....84001.html

    The Absurdity of Inflation, String Theory and The Multiverse – Dr. Bruce Gordon – video
    https://www.youtube.com/watch?v=ff_sNyGNSko

    Last power-point of preceding video

    The End Of Materialism? – Dr. Bruce Gordon
    * In the multiverse, anything can happen for no reason at all.
    * In other words, the materialist is forced to believe in random miracles as a explanatory principle.
    * In a Theistic universe, nothing happens without a reason. Miracles are therefore intelligently directed deviations from divinely maintained regularities, and are thus expressions of rational purpose.
    * Scientific materialism is (therefore) epistemically self defeating: it makes scientific rationality impossible.

    Solution? Ditch methodological naturalism as the unwarranted a priori assumption of science!

  2. 2
    ppolish says:

    The best Science today has two principles teetering – Copernican & Darwinian.
    https://m.youtube.com/watch?v=p8cBvMCucTg
    Exciting times to be following Science:)

  3. 3
    cantor says:

    The exact details of the signatures depends intimately on the models – ranging from cold or hot spots in the cosmic microwave background to anomalous voids in the distribution of galaxies.

    I’m not sure how good the analogy is, but whenever I read stuff like this it reminds me of fitting a polynomial model to a set of data.

    If the model has enough free parameters, you can fit it to the existing data, then tweak it to fit just about any new observation that comes along.

    In other words, the model (and its predictions) is useless.

    ~

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