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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 9:10 am
(This post was last modified: March 21, 2016 at 9:10 am by Alex K.)
(March 21, 2016 at 8:24 am)KUSA Wrote: (March 21, 2016 at 7:18 am)Alex K Wrote: What does that even mean, KUSA, that the past exists?
There is no such thing as the past, only the present. People act like the past and future exist simultaneously with the present. The past is only a memory and the future is only an expectation.
That doesn't answer the question, KUSA, you just restated what you've said before with slightly different words. What is the difference between the past existing and the past not existing? What does the distinction mean?
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Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 9:11 am
(March 21, 2016 at 9:10 am)Alex K Wrote: (March 21, 2016 at 8:24 am)KUSA Wrote: There is no such thing as the past, only the present. People act like the past and future exist simultaneously with the present. The past is only a memory and the future is only an expectation.
That doesn't answer the question, KUSA, you just restated what you've said before with slightly different words. What is the difference between the past existing and the past not existing? What does the distinction mean?
Not quite following you.
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 9:21 am
(March 21, 2016 at 9:11 am)KUSA Wrote: (March 21, 2016 at 9:10 am)Alex K Wrote: That doesn't answer the question, KUSA, you just restated what you've said before with slightly different words. What is the difference between the past existing and the past not existing? What does the distinction mean?
Not quite following you.
Hmmm. I'll try to clarify what I mean. So, usually, when we talk about things existing or not, we refer to an object and a certain point in time (did it exist then or not). It's not at all obvious to me what it means to generalize this to "one point in time existing at another point in time", or a point in time just plain existing.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 9:32 am
Guys.... the old turtle knew it all!
![[Image: fe77b9bb308ded5147cb0d6eaedeb158.jpg]](https://images.weserv.nl/?url=www.relatably.com%2Fq%2Fimg%2Fquotes-kung-fu-panda-past-present-future%2Ffe77b9bb308ded5147cb0d6eaedeb158.jpg)
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 9:49 am
Gift means poison in German. Just sayin'...
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 10:07 am
Found this at Wiki . . .
All scientific experiments and human experiences occur over trillions of Planck times,[3] making any events happening at the Planck scale hard to detect. As of May 2010, the smallest time interval uncertainty in direct measurements is on the order of 12 attoseconds (1.2 × 10−17 seconds), about 2.2 × 10^26 Planck times
depressing (no?) that we can't delve into the flow of time (so to speak) any closer than that. That factor of 100000000000000000000000000 looks like it's going to be a little tough to crack. Not being able to discern past from future any closer than that leaves all manner of wiggle room for SATAN . . . .
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 10:34 am
(This post was last modified: March 21, 2016 at 10:35 am by Alex K.)
(March 21, 2016 at 10:07 am)vorlon13 Wrote: Found this at Wiki . . .
All scientific experiments and human experiences occur over trillions of Planck times,[3] making any events happening at the Planck scale hard to detect. As of May 2010, the smallest time interval uncertainty in direct measurements is on the order of 12 attoseconds (1.2 × 10−17 seconds), about 2.2 × 10^26 Planck times
depressing (no?) that we can't delve into the flow of time (so to speak) any closer than that. That factor of 100000000000000000000000000 looks like it's going to be a little tough to crack. Not being able to discern past from future any closer than that leaves all manner of wiggle room for SATAN . . . .
While that may be the shortest direct measurements of time via pulsed light or something, one can translate the Energies of particle colliders such as the LHC into timescales at which the relevant scattering processes happen - by that logic, the hardest collissions at the LHC probe physics at something like 10^15 Planck times. Better, but still ways to go...
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
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Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 11:28 am
(March 21, 2016 at 9:21 am)Alex K Wrote: (March 21, 2016 at 9:11 am)KUSA Wrote: Not quite following you.
Hmmm. I'll try to clarify what I mean. So, usually, when we talk about things existing or not, we refer to an object and a certain point in time (did it exist then or not). It's not at all obvious to me what it means to generalize this to "one point in time existing at another point in time", or a point in time just plain existing.
It does get confusing trying to talk about time. What I am saying is that yesterday did exist but does not anymore. It is gone and can never come back. People think we can jump back in time but that really doesn't make sense because the past isn't there (or anywhere). In order to make the past happen again, you would have to put every particle back in its previous spatial location with the same energy level and direction. It's not possible.
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 21, 2016 at 12:42 pm
(March 20, 2016 at 1:54 pm)KUSA Wrote: Does anyone here believe that the past exists?
If there is a future then there is a past. If there is no past then there isn't a future.
If 1 second before the current time is past.
Then 0.9 second before current time is also past.
So is 0.1 second.
Likewise, so is an infinitely small time before current time the past. Since we can disregard an infinitely small time then the current present is the past.
If 2 second after current second is future.
So is 1 second after current time.
So is an infinitely small time after current time the future. Since the difference is infinitesimally small we can disregard it, so we living in the past and the future simultaneously which is what we call present.
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RE: Does the Law of Conservation of Matter/Energy Disallow Time Travel?
March 22, 2016 at 7:58 am
(March 20, 2016 at 1:54 pm)KUSA Wrote: Does anyone here believe that the past exists?
If you board the Starship Enterprise, you could leave earth's orbit at warp speed and look back to earth and see yourself boarding.
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