Sorry for dropping out for a while. We have a brand new grand daughter and there are more important things to do. At the same time, I kind of lost heart in the idea of reaching anyone when everyone seemed to want to understand the universe without understanding mathematics. Even Paul, who I know has a masters in mathematics, made the comment, "as far as we can get without 'going mathematical'" which bothered me quite a little considering the source. As you all should know by this time, I regard mathematics as a language constructed by people concerned with exact meaning; as such, I agree with Feynman that "mathematics is the distilled essence of logic. Essentially, Paul's comment had exactly the same impact on me as would the comment "as far as we can get without "being logical".
Add to that the fact that another thread which I thought was at least developing a little interest on another forum encountered a rather extreme reaction and was terminated in a thread lock when I referred to their physics expert an http://www.scienceforums.net/forums/showthread.php?t=20615&page=3 . Actually, his reaction was quite similar to most all professional reactions; I think they have too much invested in being right to think about any other possibilities.
However, barring my declining interest in butting my head against a stone wall, I was surprised to find you all still at least a little interested in what I was talking about and thought I might answer your questions.
Canute said:
Q1: How is 'self-consistent' defined here? Specifically, would quantum theory qualify as a self-consistent (mental or otherwise) model despite the contradiction at the heart of it?
As I said above, I regard mathematics as the only decently defined language. Mathematics consists of complex systems of defined objects and procedures which allow us to make large numbers of relational statements. Such a "mathematical" system is deemed "self-consistent" when the constructed statements within the system are not a function of the procedure used to arrive at the statement when multiple procedures leading to the same statement exist. If English were a well defined construct, then the concept self consistent would have meaning in English; however, in my opinion, English is far to vague to provide one with internal self consistency over any substantial range of logic.
Canute said:
Q2: For 'explanation' my dictionary is not very helpful. It equates explaining with rendering comprehensible. But the explanation of Nature given by physics is incomprehensible to us according to most physicists. Does this create a problem for the definition here or not? Is 'explanation' given a more precise definition later?
I define "
An explanation" to be
a method of obtaining expectations from
given known information. That is my definition and I think it is quite precise. My entire presentation is based on that definition and my conclusions follow directly from that definition. If it is your intention to call my definition into question, I would appreciate your giving me an explanation which does not provide you with any expectations or a logical procedure for producing expectations which can not be seen as an explanation.
moving finger said:
How is “knowledge” defined as used above? Should we assume the Justified True Belief (JTB) definition?
As far as I am concerned, using that definition is fine; however, by bringing the question up you point out that you are missing perhaps the single most important aspect of the presentation: i.e., the deduction is not a function of the definition of "what is known" (the elements which go to make up
C are intentionally undefined).
moving finger said:
(if so, then some of the above is incorrect).
You will need point out exactly what you are referring to before I can comment on that statement.
moving finger said:
(4) presumes that we can arrive at the perfect explanation at the outset.
I think that is a function of your point of view. From my point of view the assumption is that, if it is impossible to arrive at the perfect explanation, we will fail to find one: i.e., it can't hurt to look.
moving finger said:
This is not how progress in understanding is normally made – normally we start with one explanation and adapt and evolve it as more information is added (eg Newtonian Mechanics being replaced by Relativity) – that our explanations evolve and change as we understand more is something we should accept.
And you are putting this forth as a reason for not looking at the big picture in a coherent manner? There are lots and lots of people attempting to understand the universe via the "normal" approach. I call it the "by guess and by golly" approach.
My whole development began with an attempt to understand how the problem should be approached intelligently. I was actually quite surprised to discover that all the equations of modern physics were approximate solutions to my "fundamental equation". Clearly, since my development is nothing more than a tautology based on the definition of an explanation, it appears that the entire field of physics tells us nothing about reality. If their results are no more than the logical consequences of an internally consistent explanation how can there be any real content? Now that is an issue really worthy of serious discussion.
I personally believe the resolution of this conundrum lies in essence of symmetry arguments. Paul has brought up Noether's theorem several times. Most scientists see Noether's theorem as the fundamental foundation of symmetry arguments but I think there is more there than they think. An excellent discourse on the common scientific view of Noether's theorem can be found on
[URL='https://www.physicsforums.com/insights/author/john-baez/']John Baez's website[/url].
Symmetry arguments are often referred to as the most powerful arguments extant. I have heard them referred to as the only arguments which can produce something from nothing. The general introduction to a symmetry argument begins by supposing a symmetry and then logically deducing the consequence. In general, little time is spent on the issue of a general definition of a symmetry. At least Baez tells us what he means by a symmetry: "Next, suppose the Lagrangian L has a symmetry,
meaning that it doesn't change when you apply some one-parameter family of transformations sending q to some new position q(s)[/color]." He then progresses through a pretty standard deduction of the relevant conserved quantity.
What I would like to point out is the fact that no mathematical deduction of any kind can produce a result which is not embedded in the axioms relevant to that deduction. That is, all proofs are tautological in nature as there is nothing in the result which was not stated in the original axioms: i.e., they amount to "saying the same thing twice", the essential definition of a tautology. To me it seems worthwhile to examine exactly how those conservation effects are embedded in the axioms. I think that the issue can be cleared up by examining the definition of symmetry carefully.
Just for the fun of it, let's take shift symmetry as an example. Shift symmetry has to do with the case where the analysis of a problem cannot depend upon our selection of the origin. The symmetry argument then leads to conservation of momentum. The real problem here is that, if shifting the origin has no impact on the problem to be solved, then the solution of that problem cannot depend upon the selection of the origin. That being the case, if I give the problem to two different students (one of them could be God himself) if they can find a correct answer, their answers must be exactly the same no matter what origin I select when I hand them the problem. In fact, I should not even have to tell them what point I selected as the origin when I composed the problem.
It should be clear to everyone that, under the description of the problem as I have given it here, any problem concerning the position of an object cannot be solved. It is absolutely necessary that the student make some selection of an origin before he can even express the position of the object. When he makes that selection, he is assuming something he cannot possibly know. But what he assumes cannot have any bearing on the solution thus the probability the object will be found at some position (x-a) (obtained by student number one, who's origin differs from mine by a) must be identical to the probability the object will be found at some position (x-b) (obtained by student number two, who's origin differs from mine by b). This means that P(x+c+d) must be identical to P(x+c) or the solution is an invalid solution (clearly c can be set to -a and d to a-b). As this relationship has absolutely nothing to do with what a or b is chosen, anyone familiar with calculus should see that the derivative of the probability with respect to the shift must vanish. (The derivative is simply defined to be limit, as d goes to zero, of the quantity (P(x+c+d)-P(x+c)) divided by d so it cannot be anything but zero.) All that is left is to define what we are going to call the differential. The concept "momentum" can be defined in terms of that differential and, by this means, one is able to obtain "conservation of momentum".
So let's review exactly what has happened here. Essentially, the problem was unsolvable as given as any solution had to presume the existence of a meaningful (yet unknowable) concept called "the origin". Thus the statement of a symmetry is really a statement of an assumption in
the representation of the problem[/color] which has no bearing on the real problem. The solution of the problem thus involves an unstated assumption. It is that assumption which is exactly equivalent to asserting that the specified derivative vanishes. As moving finger has stated many times, one cannot make any deductions without making some assumptions. What I have actually shown is that those assumptions must include assumptions which are equivalent to differential relationships.
To put it another way, what I have shown (in my paper, http://home.jam.rr.com/dicksfiles/Explain/Explain.htm )
is that you cannot solve the problem of explaining anything without making the assumption that my fundamental equation is a valid relationship; it is a pure consequence of your assumption of a basis of representation of your ideas. (Physicists have essentially made that very assumption and the assumption fundamentally constitutes the assumption that physics correctly explains the universe.) Now I find that a very interesting thing to think about.
Have fun -- Dick