Randomness. What exactly is random? Well, it's nothing. It doesn't exist. But let's explain it a bit.
"Random" is an action that no person can predict by himself. Do we agree upon that? Because this is how I'm seeing it. If I roll a dice I cannot know what the result will be, except if I use some advanced physics/maths. In that case I can know the result, but by myself I can't.
Let's take the computer as an example. On
random.org you can generate a random number between x and y. I was wondering for a long time how a computer chooses a random number. It doesn't have a "dice" to "roll". And even if it had, it is a machine. Thus, it could calculate the result before the dice finish. I did a research and found this wikipedia link:
Hardware random number generatorIn computing, a hardware random number generator (HRNG) or true random number generator (TRNG) is a device that generates random numbers from a physical process, rather than by means of an algorithm. Such devices are often based on microscopic phenomena that generate low-level, statistically random "noise" signals, such as thermal noise, the photoelectric effect, involving a beam splitter, and other quantum phenomena. These stochastic processes are, in theory, completely unpredictable, and the theory's assertions of unpredictability are subject to experimental test. This is in contrast to the paradigm of pseudo-random number generation commonly implemented in computer programs.
It says that it creates random numbers from a physical process, rather by means of an algorithm. Now the question comes.
Don't algorithms "read" directly from the hardware? All computers on the world have a piece of hardware that generates random numbers, right? Without it, an algorithm is useless, isn't it?
