Live data from Hacker News

What If Time Really Exists? (2008)

arxiv.org

21–30 of 215 posts

Re: What If Time Really Exists? (2008)

#21

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

haha, I had the exact opposite conclusion: good thing it's all an illusion so I carry on laughing about it all! :P

That can be a useful perspective as long as you don't let it slide into inconsequentialism.

Re: What If Time Really Exists? (2008)

#22

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

There is no serious evidence for the simulation theory. It is more of a religious belief than a scientific theory since it poses more problems than it answers (who is running the simulation? How did they come to exist? What is their reality like? Etc.)

Re: What If Time Really Exists? (2008)

#23

Time exists. It's the observed difference between two states. Also, i am not a physicist.

>Time exists. It's the observed difference between two states. For something to be said to exist, must it not be immediately observable in the present? Since state is perpetually changing, isn't "the observed difference between two states" always an observation of the past and never the present? Perhaps it is more precise to say that change exists rather than time because "the observed difference between two states"…

> For something to be said to exist, must it not be immediately observable in the present?

I don't know...if you define it as such, then yes. But does something need to be immediately observable in a frozen state in order to exist?

Re: What If Time Really Exists? (2008)

#24

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

Or: when everyone around you agrees about the nature of reality, you can be certain it's completely wrong.

Re: What If Time Really Exists? (2008)

#25
post #22

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

There is no serious evidence for the simulation theory. It is more of a religious belief than a scientific theory since it poses more problems than it answers (who is running the simulation? How did they come to exist? What is their reality like? Etc.)

I don't think it's religious. It's more like a conjecture in mathematics, an idea meant to inspire questions. The fact that it poses more problems than it answers is the whole point!

We know that systems can be nested. Do we know that the systems we perceive and can test directly compose the most fundamental layer? How can we tell? If we want to have any faith in science and testing our direct experiences, we need to keep those questions in mind.

Re: What If Time Really Exists? (2008)

#26

Earlier quoted context omitted.

The simulation argument comes from the fact that there a quite a lot of physics effects that are both surprising, and look an awful lot like dirty hacks that a programmer might put it. Quantum physics looks a lot like lazy evaluation (State doesn't exist until "observed"). The speed of light seems like a hack to prevent an n squared problem of everything in the universe effecting everything at the same time.

I think it's hubris to suggest that just because something is surprising to us that we explain it based on our experience with our own limited technology.

Or: the theories we use to explain the nature of reality are metaphors that rest on the technology of the time.

Re: What If Time Really Exists? (2008)

#27

Time exists. It's the observed difference between two states. Also, i am not a physicist.

I would argue that the concept of time is what is used to explain the transition between two states, not the difference between them. Time is not required for either state to exist by itself, but because the speed of light is finite it must take a finite amount of time to change one configuration of matter (state) into another one.

"Time" is just another word for "change".

Re: What If Time Really Exists? (2008)

#28

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

The whole idea that Universe is a simulation vs real is absurd to me. What if the Universe is a simulation running in a computer no one actually built but just fluctuated into existence. Does that make it more real or still a simulation?

Re: What If Time Really Exists? (2008)

#29

Between modern physics suggesting time and space may be illusions, leading technologists agreeing that we're almost certainly in a simulated reality, and many ancient traditions being certain that this is all an illusion, I may have to have to go ahead and take this seriously....

The simulation argument comes from the fact that there a quite a lot of physics effects that are both surprising, and look an awful lot like dirty hacks that a programmer might put it. Quantum physics looks a lot like lazy evaluation (State doesn't exist until "observed"). The speed of light seems like a hack to prevent an n squared problem of everything in the universe effecting everything at the same time.

These are pretty fascinating observations. Are there any books/articles on the concept of "reality = dirty hack"?

Re: What If Time Really Exists? (2008)

#30
post #7

Earlier quoted context omitted.

What is ironic is the amount of blind faith required to accept some of these things that are so completely against everything we experience. It's very nearly a religion.

> It's very nearly a religion. I'd argue it is a religion. The word religion means to "bind back" or "yoke" [edited], i.e. to seek an understanding of the universe and our place in it. That's what physicists and cosmologists do. These disciplines also fulfill the needs of scientists for meaning and community and ritual, not unlike Christianity or Islam or whatever. Just because you might happen to believe something d…

> The word religion means to "bind back" or "yolk",

No, it doesn't. Less importantly, you mean "yoke" and not "yolk", and more importantly you are confusing the definition of a the Latin word religare from which it is believed the Latin word religio may have been derived (from which, in turn, the Middle English "religion" meaning "life under monastic vows" may have been derived) with the definition of the Modern English word "religion".

The Modern English word religion doesn't mean the same thing as Latin religare, or even Latin religio, or even the original Middle English sense of religion.

Post reply on HN