moving finger said:
... spacelike separation has nothing to do with correlation, it has to do only with direct causation, and the two are quite different.
Billy T said:
I understand this difference.
Good. Then you should understand that two spacelike separated radioactive sources can nevertheless be correlated – ie the combined output from those sources is not necessarily random.
Billy T said:
I think at this point we should just agree to disagree on the randomness of my series.
Billy T, with respect, you are simply being blind to the obvious. Spacelike separation (I agree) DOES imply
no direct causal influence; but it does NOT imply
no correlation. That is a very simple truth that (I am sorry) you seem to wish to ignore.
Billy T said:
Also in a deterministic universe, even if not entangled, the decay a B at time T2 could have many factors, none from events at A prohibited from direct causation by speed of light limit, unless entangled, but both the near simultaneous decay at A & B could have common cause(s) in the past.
In a 100% deterministic universe, if the entire universe was within causal contact at some stage in the past (ie the moment of the Big Bang) then ALL (all, not some) of the subsequent events in that universe
WILL NECESSARILY BE CORRELATED. Think about it. Each and every event, no matter how far it is TODAY from other events in terms of spacelike separation, can be traced back along a pure deterministic line to the Big Bang, where all the universe arises in a common cause.
It’s a bit like a family tree. I may be on the other side of the world from and totally out of touch with my long-lost cousin, but we can both trace a link back in the past to common ancestors. Determinism acts just the same way.
If the universe originated in a singularity and is 100% deterministic, then all today’s events can be traced back 100% deterministically to a common source in the past – hence ALL events are correlated today and forevermore.
The ONLY way to argue uncorrelated events is to postulate EITHER the universe is not 100% deterministic, OR not all parts of the universe arose from a common source (in causal contact) in the past (or both). You cannot derive randomness in any other way, I am sorry.
Billy T said:
it is logically possible that my sequence is not random. I would need to rely upon the many experimental tests that have demonstrated that radio active decays are not influenced by external events (like magnetic or electrical forces and the only other two known forces are too short range) .
It makes no difference whether radioactive events are influenced by external factors or not! I would hope (really) that someone with a PhD in physics could see this. The
ONLY important factors are (a) is the world 100% deterministic? and (b) did everything arise from some common source in the past?
If the answers to (a) and (b) are both “yes” then it necessarily follows that EVERYTHING we see is correlated with everything else, whether there is direct causal contact in the present day or not.
Billy T said:
Thus I accept that the sequence I construct from space like decays only is demonstrable random, (Even for a single source - for example assign A if interval from last decay is twice average and assign B if it is less than half average. This would have a bias towards either A or B, but with a little adjustment in the "half interval," the difference in long run between the number of A & Bs could be made very small.
I.e. I will cease to argue with you on this aspect, but think you need to do better in defining "choice" also.
You seem not to like my definitions (which is cool), yet you do not propose alternative definitions of your own. I define choice as taking 2 or more inputs and producing 1 output. If you disagree, then please do offer (what you consider to be) a better definition.
Billy T said:
For me, if the future is determined completely by the past, then nothing I would call "choice" is possible.
Implicit in your argument is the assumption that you are referring to “free choice” or “unconstrained choice” as opposed to “constrained choice”. In a deterministic universe, then it is a simple fact that all choices are constrained. I can still make choices in such a universe, and a computer can still make choices, it is simply the case that our choices are constrained, by determinism.
Billy T said:
In my example of you making a left turn (as opposed to a right one) you have the illusion of a choice,
No, in this case I have the illusion of a free (unconstrained) choice. But I do not have the illusion of choice, I know that I choose, and I do choose. What is debatable is simply whether my choice is constrained or unconstrained.
Billy T said:
but that, like everything else, was fixed before you were born in a deterministic universe. Thus it is not a choice, it is an inevitability.
It is still a choice, I am sorry. I choose between two possibilities. I agree my choice may be pre-determined, but that does not make it “not a choice”.
Billy T said:
That follows from what I understand the words "deterministic universe" to mean. Is that not what you understand also by these words? (Perhaps this is our communication difficulty?)
Our communication difficulty (I believe) is based on different definitions. You still have not defined what you mean by free will.
Billy T said:
LaPlace put this well long ago. We don't know the future (epistemic problem) but in your system of beliefs, it is defined by the past.
No. If the world is deterministic then the future is defined by the past (and also the past by the future by the way). I am open-minded as to whether the world is deterministic or not.
Billy T said:
You can have the illusion of choice, but no choice can made. I.e. turning right, instead of the left you did, was not a choice as the right turn was no more possible than your walking to the moon.
If the universe is deterministic then my choices are pre-determined and constrained, yes.
Billy T said:
If you are going to define "choice" as you have (2 inputs with one output) then turning left instead of walking to the moon was a choice, but that is not what choice means to me
Clearly.
Billy T said:
There must be a selection by an agent between at least two alternatives, not uniquely following a path determined years ago, before you were born
But there ARE two alternatives in the mind of the agent. The agent can model the situation and can foresee what will happen with (a) and with (b), even if the agent is operating deterministically. The choice that the agent subsequently makes may well be determined, but in my book that would simply be a “constrained choice”.
Billy T said:
I admit I have only given partial definitions of "free will" and "real choices" by telling examples of things they are not. You have yet to do this, so until you do, stop asking me for more positive definitions
I beg your pardon? I have given VERY clear and concise definitions of both free will and choice in this thread. If we provide clear and unambiguous definitions about what these terms “mean”, then ( I hope you would agree) we should not need to explain what these terms “do not mean”.
You choose not to accept the definitions I offered (on the other hand, in your definition of choice, maybe you did not in fact “choose”?), but that does not mean that I have not defined these terms. You are the one that seems to refuse to define what you are talking about. I wonder why?
To refresh your memory, my definitions are :
free will is the ability of an agent to anticipate alternate possible outcomes dependent on alternate courses of action and to choose which course of action to follow and in so doing to behave in a manner such that the agent’s choice appears, both to itself and to an outside observer, to be reasoned but not consistently predictable (post #47)
A
choice between two or more alternatives is the equivalent of simply taking two or more inputs and producing one output. (post #49)
Billy T said:
Tell me what constitutes a "choice" in a universe where exactly everything that happens in 2008 (including your left turn) has already been decided
Read the definition above. The difference between us is that you seem to assume that “choice” necessarily implies “unconstrained choice”, whereas I do not.
moving finger said:
..."Free will" is a very real feeling that we do have, and when we understand precisely what this "free will" is in the way I have described above, then we can clearly see that "free will" is very real, and we are justified in believing that we act with "free will", even in a deterministic universe...
Billy T said:
I think I understand your position, but it is one i would call an illusion of free will.
And that is exactly what I predicted – that many people would prefer to call this an "illusion".
But free will as I have defined it here is
100% compatible with determinism, hence is
not an illusion, even in a deterministic universe.
I do not accept that you can make the conclusion that free will is an illusion,
unless and until you provide an alternative definition of free will (which you seem reluctant to do) which can be shown to be incompatible with determinism – hence your conclusion is invalid.
Billy T said:
You seem to be claiming that the internalized factors that compelled (determined) you to make a left turn in 2008 would be your "free will" at the time when you "decided" to make the left turn
No. I am claiming that anyone who defines free will as I have done above is correct in believing that they act with free will. You seem to have a different definition of free will, but as long as you insist on keeping the definition “secret” then (with respect) it is irrelevant whether you think free will is an illusion or not.
What you are in effect saying is that “something that I cannot/will not define, is an illusion”, which is pretty meaningless really, don’t you agree?
Billy T said:
I claim that you as a physical body governed by the laws of nature in a completely deterministic universe, only think you are making a choice
We are going round in circles, aren’t we. Depends on one’s definition of choice, and you clearly believe that choice implies unconstrained choice, whereas I do not. Period.
Billy T said:
In fact that left turn was determined before you were born
If the universe is deterministic, yes I agree.
Billy T said:
We can agree to let me refer to this as inevitable act, producing what I call the "illusion of choice" and let you call it "a choice" because some of the deterministic factors which produced this act were "internalized" to use your term.
I would prefer to say that it is a constrained choice; or that in a deterministic universe, we cannot make unconstrained choices.
Billy T said:
I.e. I am willing to drop the discussion if you like, but I would add your "already determined free will future acts" to the list of things I have already given as not "genuine free will." Except for this negative list, I admit I have difficulty defining what "genuine free will" is.
If you do not accept the definition of free will that I have provided already some time ago, then with respect I don’t think we can make any further progress in this debate unless and until you provide an alternative definition of free will that you are happy with.
Billy T said:
The thing that makes the exchange with Moving Finger interesting is that he is:
(1) well informed, logical etc. and
(2) is claiming that the universe is deterministic (although at times his seems not so sure about this at the quantum level).
Why, thank you!
Just to clarify this – I am intuitively inclined to believe that the universe is 100% deterministic even at a quantum level,
however my scientific training tells me to remain open-minded on this, because it has not been proven that QM is either deterministic or indeterministic (even though the Schroedinger equation is 100% deterministic in configuration space). This is why I very often preface my arguments with “
if the universe is 100% deterministic”.
However, IF QM is
indeterministic (ie random) then I
still do not see how this can be a source of the naïve type of free will that most people seem to want to have (but cannot define).
Billy T said:
BTW - his "handel" is well chosen - from the Rubiant (Fitzgerald's second translation if memory serves be correctly) "The moving finger writes and having writ, moves on. / Not all you piety nor wit, can lure it back to cancel half a line of it." (Not exact also from memory.) It is my second most favorite poem. filled with determinism.
Well done! Except that it says NOTHING of determinism, but everything about the impossibility of changing the past
The Moving Finger writes; and having writ,
Moves on: nor all your Piety nor Wit
Shall lure it back to cancel half a Line,
Nor all your Tears wash out a Word of it.
The Rubôayôat of Omar Khayyôam, translated by Edward Fitzgerald (1953)
MF
