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According to MIT's Technology Review, "using the world's most powerful supercomputers, physicists have only managed to simulate tiny corners of the cosmos just a few femtometers across (A femtometer is 10^-15 metres.) That may not sound like much but the significant point is that the simulation is essentially indistinguishable from the real thing (at least as far as we understand it)."
The computer analogy. As John Gribbin puts it, "nature seems to 'make the calculation' and then present us with an observed event." Both the "how" and the "why" of this process can be addressed through the metaphor of a computer which is programmed to project images to create an experience for the user, who is a conscious being.
The "how" is described structurally by a computer which runs a program. The program provides an algorithm for determining the position (in this example) of every part of the image, which is to say, every pixel that will be projected to the user. The mechanism for transforming the programming into the projection is the user interface. This can be analogized to the computer monitor, and the mouse or joystick or other device for viewing one part of the image or another. When the user chooses to view one part of the image, those pixels must be calculated and displayed; all other parts of the image remain stored in the computer as programming. Thus, the pixels being viewed must follow the logic of the projection, which is that they should move like particles across the screen. The programming representing the parts of the image not being displayed need not follow this logic, and may remain as formulas. Calculating and displaying any particular pixel is entirely a function of conveying information to the user, and it necessarily involves a "change" from the inchoate mathematical relationships represented by the formula to the specific pixel generated according to those relationships. The user can never "see" the programming, but by analysis can deduce its mathematical operation by careful observation of the manner in which the pixels are displayed. The algorithm does not collapse into a pixel; rather, the algorithm tells the monitor where and how to produce the pixel for display to the user according to which part of the image the user is viewing.
The "why" is problematical in the cosmic sense, but is easily stated within the limits of our computer metaphor. The programming produces images for the user because the entire set up was designed to do just that: to present images to a user (viewer) as needed by the user. The ultimate "why" depends on the motivation of the designer. In our experience, the maker of a video game seeks to engage the attention of the user to the end that the user will spend money for the product and generate profits for the designer. This seems an unlikely motivation for designing the universe simulation in which we work and play.
Originally posted by blackcube
I must be dumb because I can't see much similarities between world and a web page and can do my coding
(Metaphorically speaking) Your brain is the digital TV set technology/imagery system that receives information/data from the outside world like a TV set receiving information/signals and converting it into a real time (live organic)i 3D picture.
What is sight? = Technology
What is technology? = Creation
Everything a persons sees is not actually seen at all - it's merely information encoded within energy or 'matter' vibrating at certain frequencies/stations based on the planetary operating system which contains ingredient #1, 2 & (some but not all 3).
The above LCD Television set shows a metaphor/analogy. Let's compare the TV set picture/reality/channel (if 'souls' really existed inside of TV channels) to the 3D non-material/energy/informational world/creation/technology humans live in that is something truly indescribable/incomprehensible fully to man so don't get the wrong impression/idea thinking that humans actually live in a TV set/channel/station or digitalized computer system because TV's and computers of course are super super beyond low-grade technology. Comparing earth's universal system/creation/technology to a TV set would be like comparing an ants nest to a spaceship.