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Old 01-07-2002, 07:25 AM   #81
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Quote:
Originally posted by Apikorus:
<strong>
When it comes to states of physical reality, I am rather skeptical of the utility (or even the sensibility) of the "principle of sufficient reason" you invoked earlier on in the thread. For starters, defining a state of physical reality is tricky. Is such a state (call it A) specified by the ket vector of the wave functional of the universe at a given time? (I mean not the HH wave functional of the space-time metric, but rather the pedestrian quantum field theoretic functional of all matter and gauge boson fields at a given instant of time.) With what precision is it specified? Even classically, it seems to me that the only sensible definition of causality in the physical world is the one inherited from relativity, namely that an event A is caused (I prefer "influenced") by all events within its backward light cone. If we adopt the free-for-all of the many worlds interpretation of quantum mechanics, with disconnected branches of reality being spawned at every instant, it seems we can make a mess out of causality.

[ January 06, 2002: Message edited by: Apikorus ]</strong>
I think I speak for just about everyone when I say "huh?"
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Old 01-07-2002, 09:54 AM   #82
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Originally posted by Kenny:
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Well, Theophilus, you just had to go and ask the hard question didn’t you? Thanks for your kind words, BTW. Since I do not assign time any real sort of metaphysical primacy, but view it simply as an artifact of causal relationships, I am content to give it a completely operational definition, and define it in terms of how it is measured. Perhaps a good definition, from a physics standpoint, would be: If a beam of light travels in a vacuum a distance x, in a particular reference frame, the time it takes this beam to travel in that reference frame is defined as x/c where c is the speed of light.

This may seem like cheating since all this definition does is reference a standard for how time is measured without seeking to characterize what it is in a metaphysical sense, but, like I said, since I believe that time is simply a measure of how things are related to each other, I do not see it has having a primary metaphysical status to begin with. Think about trying to define what a meter is, for instance. Prior to its more modern definition in terms of the speed of light, a meter was defined relative to the length of a standard bar somewhere (in England, I think) under certain conditions at a certain temperature, humidity, etc. To say something was a meter, then, was to say that it was approximately the same length as that bar. A meter, then, is entirely a relational term of description. Is a meter a meaningful and useful term for describing relationships between things –certainly. Does a meter have any metaphysical status beyond being a description for how things are related to other things such that it could be defined in a way that characterizes the “essence” of what it is to be a meter – no. I believe the same is true of time.

God Bless,
Kenny

[ January 06, 2002: Message edited by: Kenny ]</strong>
Thanks.
My reason for asking was to show the inherent defect in the original question, i.e., "what was God doing all that 'time.'"
This, it seems to me, is a fatal blind spot for non-theistic argumentation, i.e., they don't "know" what they're talking about.

Science, at best, gives us operational descriptions about realitiy as we receive it and tells us nothing about the the truth of "how things are." The theory of Relativity may have been successful at predicting certain physical events, but this can only be considered as highly coincidental. That, by the way, is what Einstein thought - he denied that the theory was "true" in any sense.

As far as introducng motion (a beam of light) into the time equation, isn't that circular, i.e., motion is defined as alteration in spatial relationships "over time."
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Old 01-07-2002, 12:22 PM   #83
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Quote:
Originally posted by theophilus:
[QB] Science, at best, gives us operational descriptions about realitiy as we receive it and tells us nothing about the the truth of "how things are." The theory of Relativity may have been successful at predicting certain physical events, but this can only be considered as highly coincidental.
It is unclear to me whether you are saying this from within the context non-theistic worldview or from within your own theistic one. From within naturalistic assumptions about the nature of reality, I agree that this view is ultimately where those assumptions lead (I have no desire to argue for that point at the moment, however). From within a Christian worldview, though, this seems an overly pessimistic assessment of scientific knowledge, in my opinion. As Christians be believe that the world was created by God to reflect and reveal His glory and that we have been created in God’s image with the capacity to understand how nature does this. To me, this suggests that as Christians we should not disparage the possibility of obtaining knowledge of the world through empirical investigation and that, as a community, we should take an active interest in the progress of science, though always being mindful of its limitations.

Quote:
As far as introducng motion (a beam of light) into the time equation, isn't that circular, i.e., motion is defined as alteration in spatial relationships "over time."
Not necessarily. Space, time, and motion may be what philosophers call a “closed circle” of concepts (i.e. it is impossible to define one without referencing the others). This doesn’t mean the concepts involved are meaningless anymore than the fact that it is impossible to define all the words in the dictionary independently of the other words in the dictionary makes all the words in the dictionary meaningless. In terms of relativity theory, it seems to make the most sense to privilege the speed of light in a vacuum in terms of one’s definition and regard it as a fundamental concept, since the speed of light in a vacuum turns out to be invariant across reference frames. Now, it may turn out that there are other ways to define these concepts without referencing the others, but that will ultimately just widen the circle of terms in which they are defined. Eventually, one’s definitions will have to appeal to a concept or set of concepts which are regarded as fundamental and left undefined. At any rate, this is all starting to stray into issues of epistemology and philosophy of language which are somewhat removed from the thread topic.

God Bless,
Kenny
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Old 01-07-2002, 01:50 PM   #84
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Quote:
Originally posted by Kenny:
<strong>

Not necessarily. Space, time, and motion may be what philosophers call a “closed circle” of concepts (i.e. it is impossible to define one without referencing the others). This doesn’t mean the concepts involved are meaningless anymore than the fact that it is impossible to define all the words in the dictionary independently of the other words in the dictionary makes all the words in the dictionary meaningless. In terms of relativity theory, it seems to make the most sense to privilege the speed of light in a vacuum in terms of one’s definition and regard it as a fundamental concept, since the speed of light in a vacuum turns out to be invariant across reference frames. Now, it may turn out that there are other ways to define these concepts without referencing the others, but that will ultimately just widen the circle of terms in which they are defined. Eventually, one’s definitions will have to appeal to a concept or set of concepts which are regarded as fundamental and left undefined. At any rate, this is all starting to stray into issues of epistemology and philosophy of language which are somewhat removed from the thread topic.

God Bless,
Kenny</strong>
I apologize for the lack of clarity in my earlier post. I am a Christian and my comment was about non-Christian knowledge claims. I believe that knowledge is possible BECAUSE of (an only because of) what God has revealed about himself and his creation.
The unbeliever, it seems to me, is hung on the horns of an epistemologic dilema of his own making, i.e., he can only "know" what "he" can know, which is nothing - I believe that's called solopsism.
Getting back to the original post, it raises a question, meant to disparage theism based on a concept which cannot (has not) been meaningfully explained, i.e., time.
As you mentioned in an earlier post, time is a relative term as relates to our experience (or other possible experiences). A day, defined as the period of a planets rotation would obviously be different depending on the planet, but which is the correct "day?"
You described the original question as meaningless. I would less charitably call it silly.
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Old 01-07-2002, 02:18 PM   #85
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While the relationships defined by a dictionary or another such "closed circle" may be nontrivial, the interpretation of the structure may depend on context which lies outside the circle. We learn what words like "no" and "apple" mean as children, and not from any dictionary. Nor would a dictionary be meaningful to a stoat. In the case of space and time, our understanding is rooted in our experiences of the physical world. Thought - even abstract thought - is always preceded by observation. Physicists (the theorists, at least) then conceive of mathematical structures which help us make sense of our observations. Every great physicist I know would vigorously agree with the maxim that physics is an experimental science.
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Old 01-07-2002, 03:41 PM   #86
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Quote:
Originally posted by Apikorus:
<strong>While the relationships defined by a dictionary or another such "closed circle" may be nontrivial, the interpretation of the structure may depend on context which lies outside the circle. We learn what words like "no" and "apple" mean as children, and not from any dictionary. Nor would a dictionary be meaningful to a stoat. In the case of space and time, our understanding is rooted in our experiences of the physical world. Thought - even abstract thought - is always preceded by observation. Physicists (the theorists, at least) then conceive of mathematical structures which help us make sense of our observations. Every great physicist I know would vigorously agree with the maxim that physics is an experimental science.</strong>
I agree with most of the above. I have trouble with the following: “Thought - even abstract thought - is always preceded by observation” as this seems to suggest the Lockean view that the mind enters the world as a blank slate which I do not believe to be the case. In order for any sort of inferences to be drawn from sensory experience and any sort of knowledge of the physical world to get off the ground, it seems to me that there would already have to be certain means of interpreting experience and categories of abstraction already present in the mind. However, this is a lengthy and involved debate which has plagued philosophy for centuries, so I doubt we’ll get to the bottom of it here.

I agree with you, though, that physics is an experimental science. I also agree that closed-circle concepts acquire meaning through the fact that the circle touches on experience and, I would add, certain basic intuitions and means of understanding already present in the mind. If the circle nowhere connected with any of our basic intuitions or observations, it would be meaningless (at least to us).

God Bless,
Kenny
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Old 01-07-2002, 03:46 PM   #87
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Quote:
Originally posted by theophilus:
[QB]

I apologize for the lack of clarity in my earlier post. I am a Christian and my comment was about non-Christian knowledge claims. I believe that knowledge is possible BECAUSE of (an only because of) what God has revealed about himself and his creation.
Yes, I realized that you are a Christian, and I thought that this is what you meant. I was not sure, however, if your comments on science were an expression of your own view or an expression of where the views of non-believers led. Thanks for the clarification.

God Bless,
Kenny
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Old 01-07-2002, 04:16 PM   #88
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I'm certainly not saying that each brain enters the world as a blank slate. There's the whole DNA thang, after all - we all come with software.
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Old 01-08-2002, 06:19 PM   #89
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im sure someone said this already but.......

before God created everything, there was no "time" yes it is impossible for us to think of something that doesnt have time but there were certainly no years seconds or any form of time before that <img src="graemlins/banghead.gif" border="0" alt="[Bang Head]" />
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