We all use random number generators all the time in our software. Mostly these generators only produce pseudo random numbers. They calculate their numbers from thing like the computers internal clock so it’s actually not random. For truly unpredictable numbers, you need a physical source of entropy. I just wanted to illustrate the difference between synthetic random numbers and real ones. The pictures show software generated noise how it can be made with most image editing programs and a difference blending of two high ISO exposures from a digital camera which produces real physical entropy. I think, the difference is quite obvious just by looking at them. Just keep that in mind, when you expect something to be “random” next time.
