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Is time real or an illusion

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I don't know if time's an illusion or not - it seems pretty real to me. :-)
Anyway, I have wondered about a related problem: the illusion of time's arrow. If I understand it correctly, the problem is that, why do we perceive a direction of the flow of time if, in all the equations, time always appears raised to an even integral power, so it doesn't matter if it's negative or positive.
However, maybe there's a way out in the origin of mass. I was reading a popular science book (I don't remember which, it was years ago), and the author was discussing Mach's principle. It kind of troubled me a bit, because it pretty much said that mass was the effect of the accumulated gravity of everything in the universe. But, if the universe is pretty much the same everywhere, then the total gravity in one direction is the same as in the opposite direction, and all those vectors would cancel out. At that point I though, what if it's not all the gravity in space, but all the gravity in space-time? If you could express that mathematically, I bet you'd get t**x where x is not an even integer. QED (I hope).

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I think this is an interesting question. My answer would be that time is real, not an illusion, but that it is substantially different to all things. In the bible it says that days to god are or could be millions of years to us. Maybe a better example would be to a human a year is one cycle around our sun in the middle of our solar system, but age wise a year to us is seven for a dog. A year to us is like five to a cat. A year to us is a lifetime for an ant. It is all in our span of things. We can only comprehend so far. I think that is the way it was meant to be. I figure this may not be the answer you were looking for, but it is my best answer and I hope it is fuel for thought. : )

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Umm......I say illusion. It's only real to us people. I mean, math, time, philosophy....it's all us. If we weren't here, there'd be no days, hours, minutes, or anything. Things would just exist, live, and age. But there wouldn't be time marking their age. So......I don't know. Somewhere in between, I guess. As long as we're here to tell time that it exists, then it exists.

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I was running late this morning. Turns out my boss thinks time is real.
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Haha. Guess so:P
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Everything is an illusion. But stepping in front of a bus will still hurt just as much.

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It is whatever it is to the observer. Either way, it is what fundamentally runs the world (besides money of course).

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our time, your's and mine is now, and real. Be still and know that god is with us on this journey, and if we do what we know in our hearts is right, we will see the coming of the Lord. and if we are worthy, we will go to the house of the lord, and then we will no longer feel uncertain of anything.5

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The best answer yet. Blessed be God!
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For years time seemed real and immutable, in the classical sense. More recently we find that time is effected by motion and gravity. If we weren't on this big ball with all of its gravity, would time even exist?

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Everything is illusion but time is real.