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Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly Send a noteboard - 24/05/2011 09:59:38 PM
Fair enough; I'm not demanding all the answers immediately, I just don't want to ask the wrong questions indefinitely because we expect a given answer. When you cite a preliminary measurement as evidence isn't it reasonable to note that it's significantly different from the predicted one?


Because it's a preliminary result, the point is that it's significantly close to a predicted one. As we do more measurements and analysis, we can improve techniques to get more precise results. 10% difference from a preliminary astrophysical measurement is not a big deal by itself.

Mainly in the fact that their nature was actively MISunderstood to be that of fundamental particles. It was only after they continued to multiply at an alarming rate that very capable physicists had the common sense and temerity to suggest that if there were THAT many of them maybe they weren't fundamental particles at all, but composites of more fundamental ones. Had no one every questioned the canon we'd still have dozens of "fundamental" particles and a much more impoverished (and not understood right away) grasp of physics.


What reason to you have to believe that "no one ever questioning the canon" is a legitimate concern in modern science? Sometimes it takes people a while to figure things out; I don't see how your persistent worrying ameliorates that at all.

Those increasingly seem to be ruled out entirely. I really don't have a problem with throwing out a theory contradicted by the evidence, which seems to be the case for MACHOs as well, but by that same token I'm leery of the impression I'm getting that refuting MACHO and MOND theories proves exotic dark matter by default. That amounts to saying, "Once we've conclusively demonstrated x isn't 2 or 3, it MUST be 4". Um, not really. Even if we know it must lie between 2 and 4 it may just mean we need to stop looking at whole numbers exclusively.


We have evidence of some phenomena that disagrees with predictions based on the amount of visible matter in the universe. We have evidence that modifying our theories of gravity doesn't help the situation very much. We have evidence that the phenomena acts like matter in that it gravitates, but not in other ways. We have evidence that it's not just ordinary matter that isn't lit up.

With all of that evidence, exotic dark matter is very clearly selected from the space of possible theories. Exotic dark matter is still a pretty big theory space in itself, but that's why we're still gathering evidence. What other part of theory space has a decently high probability, given all of that?

My point was that before any experimental evidence of the charm (beyond the anomaly that led to its postulation as an explanation) people were already postulating additional quarks based on it eventually being found. That all three eventually were found doesn't vindicate that approach; it amounts to extrapolating a cosmological theory that requires dark energy to exist: You're making a fairly weighty assumption your PREMISE.

So what? People came up with hypotheses and made predictions based on those hypotheses. If the predictions had been wrong, we would have moved on. Seriously, what is your problem?
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Exciting video about the universe Camilla - 28/04/2011 10:14:55 AM 1046 Views
Cool, and true *NM* Stephen - 28/04/2011 11:46:29 AM 311 Views
I still think dark matter's just non-luminous matter without a convenient light source to reflect. Joel - 28/04/2011 10:34:21 PM 781 Views
We've just about ruled out the idea that dark matter is just non-luminous "ordinary" matter. Dreaded Anomaly - 28/04/2011 11:44:34 PM 711 Views
I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 29/04/2011 01:52:49 AM 647 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 29/04/2011 02:56:32 AM 752 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 30/04/2011 05:02:49 PM 712 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 30/04/2011 08:56:35 PM 583 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Joel - 02/05/2011 01:28:30 AM 619 Views
Re: I'm aware of the Bullet Cluster, though admittedly not much more than that. Dreaded Anomaly - 04/05/2011 04:18:18 AM 720 Views
There's such a thing as knowing when you're licked, and I believe I am. Joel - 07/05/2011 02:04:53 AM 795 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 09/05/2011 11:28:48 PM 630 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Joel - 14/05/2011 05:36:45 AM 576 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 17/05/2011 02:09:40 AM 670 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Joel - 19/05/2011 04:55:21 AM 590 Views
Re: There's such a thing as knowing when you're licked, and I believe I am. Dreaded Anomaly - 24/05/2011 09:32:27 PM 666 Views
The Pati-Salam model was the one I had in mind. Joel - 24/05/2011 10:34:04 PM 610 Views
Re: The Pati-Salam model was the one I had in mind. Dreaded Anomaly - 24/05/2011 11:08:01 PM 818 Views
Re: The Pati-Salam model was the one I had in mind. Joel - 25/05/2011 01:27:10 AM 628 Views
Re: The Pati-Salam model was the one I had in mind. Dreaded Anomaly - 31/05/2011 09:16:18 AM 696 Views
Apologies for the delay; internet's been spotty and I've been busy lately. Joel - 10/06/2011 12:09:04 AM 944 Views
Re: Apologies for the delay; internet's been spotty and I've been busy lately. Dreaded Anomaly - 14/06/2011 03:38:18 AM 948 Views
Also, re: lensing from ordinary matter: Dreaded Anomaly - 29/04/2011 05:18:47 AM 637 Views
This seems like another example of what confuses the issue. Joel - 30/04/2011 05:25:04 PM 727 Views
Re: This seems like another example of what confuses the issue. Dreaded Anomaly - 30/04/2011 08:56:40 PM 735 Views
That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 02/05/2011 01:29:03 AM 733 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 04/05/2011 04:18:24 AM 690 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 07/05/2011 02:05:02 AM 868 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 09/05/2011 11:29:36 PM 626 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 14/05/2011 05:35:56 AM 908 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 17/05/2011 02:09:55 AM 535 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 19/05/2011 02:47:25 AM 868 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 24/05/2011 09:46:30 PM 660 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 25/05/2011 12:20:10 AM 940 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 31/05/2011 09:16:22 AM 744 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Joel - 10/06/2011 12:04:06 AM 995 Views
Re: That discussion seems to reduce to "as little new and exotic physics as possible". Dreaded Anomaly - 14/06/2011 03:38:12 AM 758 Views
Re: I still think... (apparently, there is a 100 character limit on subjects, and yours was 99) Tor - 28/04/2011 11:57:15 PM 949 Views
Seems to happen to me a lot; sorry. Joel - 29/04/2011 12:56:14 AM 654 Views
None of this reflects on the actual facts of dark matter. Dreaded Anomaly - 29/04/2011 01:32:52 AM 624 Views
I concede my grasp (or grope) is a somewhat superficial laymans, yes. Joel - 30/04/2011 04:30:28 PM 748 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Dreaded Anomaly - 30/04/2011 08:56:44 PM 581 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Joel - 02/05/2011 01:28:58 AM 1094 Views
Re: I concede my grasp (or grope) is a somewhat superficial laymans, yes. Dreaded Anomaly - 04/05/2011 04:18:27 AM 623 Views
I don't object to changing my mind, but can take more convincing than I really should. Joel - 07/05/2011 02:05:09 AM 816 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 09/05/2011 11:32:17 PM 735 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 14/05/2011 05:36:24 AM 891 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 17/05/2011 02:10:03 AM 647 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 19/05/2011 04:33:06 AM 889 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 24/05/2011 09:59:38 PM 640 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 24/05/2011 11:19:43 PM 608 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 24/05/2011 11:33:58 PM 568 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 25/05/2011 12:55:36 AM 690 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 31/05/2011 09:16:24 AM 602 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Joel - 10/06/2011 12:09:13 AM 786 Views
Re: I don't object to changing my mind, but can take more convincing than I really should. Dreaded Anomaly - 14/06/2011 03:38:05 AM 755 Views
Might help if you clarified where your skepticism is at Isaac - 29/04/2011 02:32:07 AM 602 Views
Potentially either, or a combination of the two. Joel - 30/04/2011 02:36:50 PM 663 Views
It's hard to discuss without knowing your objections a bit more clearly Isaac - 30/04/2011 04:58:03 PM 580 Views
My primary objection is that alternatives to dark matter seem to have been ruled out prematurely. Joel - 02/05/2011 01:29:14 AM 719 Views
Well, they weren't, not really sure how else to put that Isaac - 10/05/2011 03:19:57 AM 743 Views
Alright then, objection withdrawn (cautious skepticism intact). Joel - 14/05/2011 05:34:17 AM 863 Views
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