Is time real or an illusion?

Adam Greene, Portsmouth

Diverse thinkers, from the ancient Greek philosophers through contemporary quantum cosmology and eternal inflation theory, have called time an illusion. For them, the perception of time passing from present moment to present moment is an artefact of our psychology, so that anything real or true is real or true eternally and timelessly. The belief that reality lies in a timeless realm of truth, rather than in the flow of events our perceptions show us, might be supported by scientific argument but equally it reflects a metaphysical prejudice. Contemporary attempts to extend quantum theory to the cosmological, to encompass the whole Universe and not just a sub-system of it, are often couched in equations which suggest time is emergent from a timeless reality. But these attempts suffer from problems, both technical and conceptual, that are even more challenging than the usual conundrums of quantum theory. Several advances in the study of quantum gravity have shown that our four-dimensional space-time is only recovered in a version of the theory in which time is real and not emergent. I would hold that, contrary to the ancient metaphysical tradition, time is not only real, it is likely that it is the only aspect of reality we experience directly that is fundamental and not emergent from anything else.

Submitted by Lee Smolin

Time as illusion

Wed, 2012-01-11 17:56
TimeOut

For an experiential view of the illusory nature of time, see these short Youtubes in the video series "Time Out!":
www.Youtube.com/PeterDziuban

time

Wed, 2011-05-11 15:30
xradar2

we know time exists but the real question is: WHAT IS IT??? try answering this

Time

Wed, 2011-05-11 18:53
M Paul Lloyd

Time is defined by the occurance of events, highlighted by movement, if everything stops, right down to the sub-atomic level then nothing happens, ergo time stops. ;)

time is real because your not

Fri, 2011-01-07 11:33
Jimidybobidybo

time is real because your not dead yet.

Is time an illusion ?

Tue, 2010-06-15 08:26
amrit

Physical time is run of clocks in a timeless space.
"Past-present-future" is a mind frame through which we experience run of clocks and all other material change in timeless space.
see more in my article here
http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PHESEM000023000002000330000001&idtype=cvips&gifs=yes&ref=no

Yours Sincerely, Amrit Sorli

Renderence

Thu, 2010-06-03 01:12
Guest

Time is made up. It is only perceived from three key aspects. Realization, Consciousness, and Motion. We only use time as a measurement. If you see it is seven o' clock and later see its nine o' clock, did two hours pass by? Or did you render the realization of consciousness and motion. For instance, if a man has a coma for two years and wakes up; you can tell him that he was in a coma for two days and he would probably believe you. This is because he did not render Realization, Consciousness and Motion because he was in a coma.

Time?rw

Mon, 2010-05-17 17:59
Guest

Time exists for us because we understand that there is a imminent end to all things.
Being conscious of this forces us to use, live and think around time, I feel. 8) (what was we on about?) lol
( YES. As i use a hammer to build the house, i use time to choose when best to do it.) Both tools of human consciousness.

time

Fri, 2010-03-12 11:54
Guest

surely time is just a label so that we can communicate our interpretation of something that is, was, or is going to happen in the physical world. The label of time is just an expression so that we as a race can communicate effectively. things will happen in the physical universe regardless of whether the human race exists in it or not, the only difference is that humans will label these events and place them into the order in which they occurred and to make these events easier to catalogue and place the label of time was created as a point or points of reference so that people could say...."oh yes i have dentist next Wednesday" .....The word and by assocciation the concept of time is really just a label so that any person can relate a sequence of events or future events to another person in a logical way.

Time is Both an Illusion and Not..

Wed, 2010-02-24 12:44
lightningmarshal

Time exists because we use it...It was invented. But Does the Universe have an Awareness Of Time. To Suggest that Time is Real is to also suggest that there are larger things at work in Creation... Imagine this Paradox.. Your dreaming a dream of the future but you dont know its the future until you witness it coming true, but you realised that the dream you were having was of someones future and you were just remotely viewing it through the dream... You notice the Dream is happening for real, and you know its that person and not you.. If you stood infront of the person and send yourself a message so you could change something in the past, would you be able to allow the dream to come true... Time does not seem to have rules, What if traveling through time requires the understanding that time has no boundries and thus the past present and furture exist as one... Im confusing you i know, but if I told you staight out you would not be able to find the conlusion for these words by your own experince.... Time exists because someone invented it... But does the Universe Know Time Exists.

huger

Sat, 2009-12-26 17:33
Guest

sorry for my poor english,,, but when you get hungry, in every second you feel a harder pian in your stomach, and you will fear about the 2 minutes later,,, and that easy you will belive in Time and future,,,

Time

Fri, 2009-11-27 03:20
Guest

Events exist and create a perception of "time" passing.
eliminate the event, and the perception of "time" passing becomes irrelevant. It becomes forever present.
"no time like the present" Maybe that means more that we know.

Surely we only know we exist

Sun, 2009-11-08 23:33
Guest

Surely we only know we exist because time itself also exists. But actually only the present exists, and only as we experience it, and so reference to time can only be made by way of experience. If nothing sentinent were around to experience time then it wouldn't exist. It's a bit like the question: if a tree falls in the woods and no one is around to hear it does it make a noise? Except in the case of time then no, time does not exist if its flow through a continual present is not experienced by reference to a future-present-past continuum. Um...

Wow

Mon, 2009-10-26 17:27
Guest

I was just sitting here thinking about this when I blogged and strangely, I come on to this site and what do I find? I doubt coincidence.

My blog on this topic:

http://jonspade.blogspot.com/2009/10/on-lighter-note.html

Space Time

Sat, 2009-10-10 11:39
Guest

Time is not an illusion. Space and time are a single continuum. One cannot exist without the other. Time travels at different speeds depending on where you go in the universe. I used to think of time as being just a concept but it is actually more of a physical dimension that actually exists. If einstein said it, it must be true!

Really?

Thu, 2009-09-17 17:57
Guest

I can't believe scientist are wasting their time with this. If time is an illusion, what a coincidence that time seems to predict the suns pattern, as well as all of astrology. The only illusion of time is the way we perceive it... ie. seconds, minutes etc. Those all being man-made measurements of what we refer to as time. If time is an illusion then so is speed. Is speed an illusion to now? Are we not traveling through space, rather space is travelling to us? Come on, sometimes I think scientists are a bunch of kids tripping on acid.

movement

Wed, 2009-09-16 15:47
Guest

I beleive that time is simply movement, or at least time as we know it is simply movement. by guaging something moving and thereby changing we aver that time is passing'.

Consider if everything remained at absolute zero and so not even an electron is moving, if we can not see any change we can not perceive time as moving at all, and then surely time as well as everything else is quite figuratively standing still.

Considering passage of time as a measure of movement rather than a psychological phenomenon takes time away from being simply a man-made construct/experience to a physical phenomenon.

CN

Time, real or an illusion?

Thu, 2009-09-03 21:40
chopin

Hmmmm, I understood the question but I got lost on that answer!

To me, time is a man-made concept invented to give understanding to the 'then, now and future' of his existence. Without mankind, I think it is safe to say there would be no time as it would not have been invented. I further believe that outside of this planet and away from the influence of mankind, time really does not exist at all.

To us, the parameter that we have chosen to describe how fast we think light travels equals the limit of understanding our invented concept of time and distance.

In reality, assuming that man had never been invented, these parameters and limits would not actually exist.

But he was and he invented such parameters and limits to try, perhaps rather badly, to explain and understand what he sees about him.

Food for thought?

Well said Chopin...

Tue, 2010-05-11 10:46
Guest

Chopin - thanks for so eloquently mirroring my exact thoughts on the subject - you have saved me the trouble!

To take it a step further, accepting that time as we know it is man-made, the rather odd thing that strikes me is the rather clumsy units that man chose for his classifications of time.

Would it not have been better to denote the passing of time as decimal units? Seconds, minutes, hours are all the invention of man - the only true constants are the days and years as dictated by Earth's rotational and orbital periods.( and months, as dictated by the moon's movements)

Really, these could have been called anything, I just think decimal time would have been so much easier to live and work with.

Time

Tue, 2009-09-08 22:41
Guest

I'm 17 and I get really annoyed when someone says that time is an illusion.
To me, time ( past, present and future ) is based around energy, and where exactly that energy is depending on the time. They say energy cannot be destroyed or created, so imagine that you have 2 chemicals which have not yet bonded, which we can imagine is the past, and in the present, we have 1 chemical, which is made from the 2 chemicals which have now bonded, this is now the present, and we don't know the future yet, so whatever happens in the future is in correspondance to what happens in the present.
Basically, the energy which was at first in the 2 chemicals is now at present in the 1 chemical, but would be keeping the 2 chemicals together, and we don't know what will happen to it in the future, so we cannot say.
When people say time machines are possible, you'd need to double the amount of energy and mass in existance and place it into the same positions as it was at the time you wanted to visit, and then you'd need to place all of this somewhere where there is no existing mass or energy, well away from our universe. In my opinion, this would be impossible.

TIme=Travel

Tue, 2009-09-29 18:30
Guest

If time travel is possible and I go back to 10 minutes BEFORE the big bang, and somehow stop it happening-would I cease to exist at that point( as I could not possibly have been created in the first place!)

jim birkEtt BN1 3HG

define illusion

Sun, 2009-11-22 12:11
Guest

some people have commented on time being an experience or perception (or perception of experience?), surely to answer the question of wether time is an illusion we need to properly define 'illusion'.
my idea of an illusion is very much based on perception vs actuality. The obvious example being optical illusions, perceiving something to be there when it's not.
My theory is that time exists, but as a measurement which is relative to space. So you cannot apply the same time measurements in one place (say the 24hr clock in our world) to another place (any other planet/sun/moon/asteroid etc in our galaxy or universe).
Also you cannot assume that one place is the same at a different point in time.

in answer to Tim=Travel, any change in time would affect space in some way as they are linked so closely, just as time is constantly being changed by where we are (seasons etc). :)

Never the same place twice

Fri, 2010-01-22 14:22
Guest

It is a given that; the earth rotates on itself; and it goes around the sun; and the sun goings round the galaxy; and the galaxy is in an ever expanding universe. Therefore we will never in the same place or point in time twice, ever.
If we could travel faster then the speed of light (big if) and we could determine the exact point in the universe that we were previously at – could we be where we where before we were there. (not sure if my 'where's' are right)
(or is all this spinning around and around on this planet going to my head)

time

Fri, 2010-05-14 00:54
Guest

Time itself is, I beleive, a real force directly linked to space that shapes and defines our universe. Where people become confused is the labels and divisions that we give them. Seconds, minutes and hours were created by us for concvenience but time as a force would march on regardless of them being there or not, it was around before our labels and will be around infinitely. Distance is the same, if humans were not here, two points a mile apart would still be the same distance apart, just no one would know to call it a mile, it wouldn't be any closer, or further away. You see, units of measurement are just our way of describing a complex and ever increasing array of natural phenomena caused by the laws of physics.