Live data from Hacker News

A simple test of whether the Universe is a hologram (or a computer)

news.ycombinator.com

11–20 of 24 posts

Re: A simple test of whether the Universe is a hologram (or a computer)

#12
There are so many wrong assumptions in this OP, most of which the OP didn't state explicitly, that for once I don't even feel like breaking it down into chunks:

> [quote of the whole thing]

No. When you run Dwarf Fortress on a slower computer, or do something in it that taxes your computer resources more, the dwarves don't suddenly sit up and take notice that something went faster in-game than it was supposed to. Everything just takes longer to calculate, at once, _including_ the dwarves' perceptions and any (in-simulation) tools they might use to measure this.

QED.

Re: A simple test of whether the Universe is a hologram (or a computer)

#14
> "Also assume that the universe has finite computational resources. Therefore resources have to be diminished in one location when they are in in demand another location."

With all due respect, it's much more likely the universe is multi-core, highly parallel and enforces proper resource allocation.

Re: A simple test of whether the Universe is a hologram (or a computer)

#15
You are mistaking internal time with external time in simulation.

Even if universe runs on Turing machine doing one instruction per external year, for one external year, and 1000 instructions per second for the next external year - you won't notice the difference from inside.

Only observators from outside will notice.

Re: A simple test of whether the Universe is a hologram (or a computer)

#16
As these measurements and observations are done inside the system, they're completely unreliable. Every time the computer clock ticks, a second goes by. It doesn't matter how fast it's ticking to an observer watching the screen, for code on the inside a tick means a second. The outside observer would notice the processor struggle to render all those details, slowing everything down to a crawl, but inside the code every tick will still signal a second.

Re: A simple test of whether the Universe is a hologram (or a computer)

#17

There are so many wrong assumptions in this OP, most of which the OP didn't state explicitly, that for once I don't even feel like breaking it down into chunks: > [quote of the whole thing] No. When you run Dwarf Fortress on a slower computer, or do something in it that taxes your computer resources more, the dwarves don't suddenly sit up and take notice that something went faster in-game than it was supposed to. Eve…

The Dwarf Fortress analogy is assuming a single threaded implementation. In other possible architectures, dwarfs might experience latency and among the other things a dwarf might do with all that free time is measure the latency.

Disproving idealism by assuming a god's eye view doesn't warrant a QED. Reality is a black box abstraction.

Re: A simple test of whether the Universe is a hologram (or a computer)

#18
"Also assume that the universe has finite computational resources. Therefore resources have to be diminished in one location when they are in in demand another location."

The "universe computer" could easily be many times larger than our universe and have enough resources to simulate everything, everywhere.

Re: A simple test of whether the Universe is a hologram (or a computer)

#19
There's a linguistic problem. Assume there are real-computers [or real-holograms]. Inside the simulation the word "computers" refers to simulated-computers. Even if we invent the term "real-computer" inside the simulation it's fully qualified referent is simulated/real-computer. Global variables aren't global to the extent their referent persists across system boundaries.

Sysadmin privileges are required to configure the same name to the same value across systems. Once a proof assumes there is a sysadmin, we have to rely on faith along with our reason.

Re: A simple test of whether the Universe is a hologram (or a computer)

#20
Ooh, I wanna play too!

And as more and more classical information in one region of space has to be simulated (Allude to wave-function collapse), less and less information is possible to know about distant matter and events, which looks like universal expansion to our mortal eyes, but it's actually our instance scaling down.

Post reply on HN