- #1
MonstersFromTheId
- 142
- 1
"Arrow of Time?" I don't understand.
I don't understand, and I'm not kidding about that, TOO many people that are a hell of a lot smarter than me ponder the question of why there appears to be an "arrow" of time, i.e. "why doesn't time run in reverse every now and then".
So I have to figure that the problem isn't in asking the question, the problem has to be that I've got something screwed up in MY head.
If you could bare with me for a time, I'd like to explain exactly why the entire question seems to me to be - literally - an inherently , a forever untestable, and therefore moot question.
Now mind you, I'm NOT trying to put forward an argument or theory here. My intent is to make clear my own fouled up thinking, so that exactly where I'm getting all of this tangled up can be more clearly seen, and explained to me.
That said - my own answer to the question of "Why is there an 'arrow' to time?" would (at the moment) be "Well, there isn't".
Time probably DOES run backwards, all the time, but - due to the nature of human perception, there's just no way in hell it's EVER going to be possible to detect - ever.
A thought experiment:
Suppose for a moment that you could take a snapshots of the state of every impulse within a human brain. Each of these snapshots is represented by a playing card.
So now, as you take one snapshot of the brain for each passing instant (say, of a "teacup" falling and breaking), you start laying them in a neat stack.
As time moves forward , your memory of passing events is represented by the stack of accumulating playing cards, where the last card laid down is always what you perceive to be "the present".
So now look at what the stack (i.e. your memory) is comprised of from moment to moment as time moves forward ...
duce, (a teacup teeters on the edge of a table)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)
six, (the pieces come to rest)<<<--perceived as "the present"
Now suppose that time DID IN FACT begin to run backward. Well, regardless of HOW the hell your memory actually works, it doesn't matter, because that process would be getting undone from moment to moment as time ran in reverse. It would HAVE to be.
As a result, even though time IS IN FACT running backwards, you wouldn't be able to sense that. To you, time would still appear to be running forward, with "the present" always perceived as the card on the top of the pile, and "the past" consisting of the cards beneath it.
In the first instant time begins to run backwards your memory of events would be comprised of...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)
six, (the pieces come to rest)<<<--perceived as "the present"
... and so the pieces coming to rest is what you'd perceive as "the present".
In the second instant of reverse time, as the teacup pieces jump back towards the point of impact, your memory of those pieces having spread from the point of impact would be de-constructed as the chemical processes that formed that memory also ran in reverse.
As a result you'd only possesses memories up to the moment of impact, and now that moment of impact becomes what you perceive as "the present", since in the second instant of reverse time, your memory now consists of...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)<<<--perceived as "the present"
In the third instant of reverse time, your memory of the teacup hitting the floor would be de-constructed (again, because the very chemical processes that formed that memory would be running backwards), and now "the present" would appear to be those moments of the cup in mid-air falling.
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)<<<--perceived as "the present"
An instant of reverse time later...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)<<<--perceived as "the present"
and finally...
duce, (a teacup teeters on the edge of a table)<<<--perceived as "the present"
At this point, time could go back to running forward again, and you'd have no idea at all that it ever happened, or any means at all of detecting that it had actually occurred.
I'm hoping that at this point someone can see exactly where I've got this all tangled up. The problem I have is that I don't see an arrow of time, I see an "arrow" inherent in human memory, due to the chemical processes that produce memory running in reverse, and "undoing" memories from moment to moment if time where to run in reverse.
And just to be clear - I do NOT believe I've got this right and everybody else has got it wrong. Let's face it, when a guy like Steven Hawking starts talking about an "arrow of time", I've got to figure he, and probably one heck of a lot of other people, have already thought of what I'm pointing out here, and that I'm the one lost in my own undies so to speak.
I'd also suspect that anyone teaching has probably also already had to untangle the thoughts of a student or two making the same point semester, after semester, after semester...
So... what am I missing here?
I don't understand, and I'm not kidding about that, TOO many people that are a hell of a lot smarter than me ponder the question of why there appears to be an "arrow" of time, i.e. "why doesn't time run in reverse every now and then".
So I have to figure that the problem isn't in asking the question, the problem has to be that I've got something screwed up in MY head.
If you could bare with me for a time, I'd like to explain exactly why the entire question seems to me to be - literally - an inherently , a forever untestable, and therefore moot question.
Now mind you, I'm NOT trying to put forward an argument or theory here. My intent is to make clear my own fouled up thinking, so that exactly where I'm getting all of this tangled up can be more clearly seen, and explained to me.
That said - my own answer to the question of "Why is there an 'arrow' to time?" would (at the moment) be "Well, there isn't".
Time probably DOES run backwards, all the time, but - due to the nature of human perception, there's just no way in hell it's EVER going to be possible to detect - ever.
A thought experiment:
Suppose for a moment that you could take a snapshots of the state of every impulse within a human brain. Each of these snapshots is represented by a playing card.
So now, as you take one snapshot of the brain for each passing instant (say, of a "teacup" falling and breaking), you start laying them in a neat stack.
As time moves forward , your memory of passing events is represented by the stack of accumulating playing cards, where the last card laid down is always what you perceive to be "the present".
So now look at what the stack (i.e. your memory) is comprised of from moment to moment as time moves forward ...
duce, (a teacup teeters on the edge of a table)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)<<<--perceived as "the present"
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)
six, (the pieces come to rest)<<<--perceived as "the present"
Now suppose that time DID IN FACT begin to run backward. Well, regardless of HOW the hell your memory actually works, it doesn't matter, because that process would be getting undone from moment to moment as time ran in reverse. It would HAVE to be.
As a result, even though time IS IN FACT running backwards, you wouldn't be able to sense that. To you, time would still appear to be running forward, with "the present" always perceived as the card on the top of the pile, and "the past" consisting of the cards beneath it.
In the first instant time begins to run backwards your memory of events would be comprised of...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)
six, (the pieces come to rest)<<<--perceived as "the present"
... and so the pieces coming to rest is what you'd perceive as "the present".
In the second instant of reverse time, as the teacup pieces jump back towards the point of impact, your memory of those pieces having spread from the point of impact would be de-constructed as the chemical processes that formed that memory also ran in reverse.
As a result you'd only possesses memories up to the moment of impact, and now that moment of impact becomes what you perceive as "the present", since in the second instant of reverse time, your memory now consists of...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)
five, (it hits the floor and shatters)<<<--perceived as "the present"
In the third instant of reverse time, your memory of the teacup hitting the floor would be de-constructed (again, because the very chemical processes that formed that memory would be running backwards), and now "the present" would appear to be those moments of the cup in mid-air falling.
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)
four, (the teacup is in mid-air falling)<<<--perceived as "the present"
An instant of reverse time later...
duce, (a teacup teeters on the edge of a table)
three, (it tips off the edge and starts to fall)<<<--perceived as "the present"
and finally...
duce, (a teacup teeters on the edge of a table)<<<--perceived as "the present"
At this point, time could go back to running forward again, and you'd have no idea at all that it ever happened, or any means at all of detecting that it had actually occurred.
I'm hoping that at this point someone can see exactly where I've got this all tangled up. The problem I have is that I don't see an arrow of time, I see an "arrow" inherent in human memory, due to the chemical processes that produce memory running in reverse, and "undoing" memories from moment to moment if time where to run in reverse.
And just to be clear - I do NOT believe I've got this right and everybody else has got it wrong. Let's face it, when a guy like Steven Hawking starts talking about an "arrow of time", I've got to figure he, and probably one heck of a lot of other people, have already thought of what I'm pointing out here, and that I'm the one lost in my own undies so to speak.
I'd also suspect that anyone teaching has probably also already had to untangle the thoughts of a student or two making the same point semester, after semester, after semester...
So... what am I missing here?