DaleSpam said:
Yes. Rotation is non-inertial motion, and it can be measured without respect to any external body simply by using an accelerometer. Furthermore, if two objects are rotating relative to each other, it is possible to experimentally identify which of the two is rotating. Rotation is empirically different from inertial motion, so examples showing that rotation is absolute will not show that inertial motion is absolute.
Cheers, I wasn't aware of that.
It's impossible to reach an inertial speed of rotation so? Is there a section of PF which would be better for learning about why that is the case?
DaleSpam said:
That is called proof by contradiction, or proof by counter-example. However, pointing out a flaw in a proof is not itself a proof by contradiction. Pointing out a flaw in a proof simply invalidates the proof, but does not give any information about the truth of the conclusion. I.e. you may use faulty logic in an attempt to prove a true proposition.
Interestingly, there is a fallacy called the fallacy fallacy, which is one of my favorite fallacies. Basically, the fallacy fallacy is when someone makes the claim that the conclusion of a fallacious argument is false because the argument is fallacious.
http://www.fallacyfiles.org/fallfall.html
Is there another name for the fallacy fallacy that takes an indefinite pronoun (the fallaciers fallacy or something like that?) I've come across it before, but thought it had a slightly different name.
It's interesting indeed, because the question is which one of us is committing it?
DaleSpam said:
I understand your point. The problem isn't a communication problem, it is a logic problem. You have clearly "illucidated" your erroneous reasoning. Further contextual examples serve no purpose.
Ultimately I think it is a communication problem, because I believe that a word has a certain, possible, meaning or implication, which you, and others, don't seem to agree with.
Ultimately logic stops short because we are looking to the physical world for validation of that meaning, one way or the other; I, and some others, would say that the physical world validates the meaning I think can be implied, while yourself and others suggest that it doesn't.
That is where the contextual examples come in.
Ultiately, the point I am making is that there are two causes which can give rise to the measured relative motion between two observers/objects.
The reasoning being given, as to why this isn't the case, appears to be tautological, which just leads back to the possible alternative explanations.
DaleSpam said:
I can appreciate the difficulty of learning SR, it took me 7 years of occasional study. However, in my experience working with other people to learn it is clear that a person who continues to argue an incorrect point (particularly one which has been clearly shown to be incorrect) is either unwilling or unable to learn until they change their attitude. For me, that was the case, and I have seen it other times. My motivation for changing my attitude was to read and understand the overwhelming experimental evidence:
http://www.edu-observatory.org/physics-faq/Relativity/SR/experiments.html
I don't think the point has been shown to be incorrect at all; the issue ultimately comes down to how we interpret our experience of the physical world. There are some who have indicated in this thread that they might have a similar understanding to myself, as far as this question goes. I know from talking to other people, outside of this forum, that they also have a similar understanding.
Part of the issue is that I understand the idea that we cannot determine the absolute nature of motion, and that we can define reference frames which reflect this; I just think we can make a further deduction from relative motion, which is that, while we cannot determine the absolute nature of motion, we can determine that motion must be absolute.
DaleSpam said:
I am looking forward to your subjecting SR to rational enquiry. So far, I have seen only evidence of personal biases and prejudices supported by fallacy. And despite the fact that the fallacious reasoning has been clearly identified you seem to cling to it anyway. It makes it quite difficult to believe that you are really interested in rational enquiry instead of personal validation.
The human condition is such that we are all going to be guilty of personal biases and prejudices, but that doesn't necessarily invalidate what it is we are biased in favour of. It is possible to believe something which is correct, just as it is to believe something which is incorrect. There can also be the same level of attachment to beliefs about things which are true; such attachment can affect how we engage with people when they appear to challenge those beliefs.
But, as I said, my empirical experience of the physical world leads me to believe that we can make a further deduction about relative motion, other than that we cannot determine the absolute nature of it. I know that I'm not alone in that thinking, so it ultimately comes down to interpretation of experience. I believe that my reasoning is perfectly logical, but you don't seem to believe it is, because you don't share the belief about the connotation of the word "move".
If there is no means to resolving that issue, then I can probably proceed in my attept to expanding my understanding of relativity with that question shelved.