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A lot of events and phenomena can be simulated. With every passing year, not only does the universe of things that can be successfully subjected to simulation grow, but the degree of the endeavor and thus the accuracy of the results improves. Let's use a dice as an example. The simplest simulation would be a one-liner program: Result = rnd(6); This assumes a perfect dice, which is not always the case. Read on... ============================================= Anecdote: When I was a child in a carnival back home, there was a "magician" with a table and some dice. After reading the rules posted behind him, I was sure that there was a way I could easily win. Soon, the fool in me was separated from his money. So, I decided to stick around and observe the M.O. of the enterprising guy closely. Sometimes, he would insert his hand inside his pocket and retrieve another pair of dice. These ones were a tiny bit flattened. You could see that the black dots that formed the numbers 3 and 4 were smaller (you probably know that the opposite sides of a dice always add up to 7, correct?) ============================================= Just to make the problem a thousand times harder, consider: - the difference in weight of the 6 faces. and a million times even harder - the effect of aerodynamics in those carved tiny holes as the dice spins around in mid-air and bounces off the table. For the impatient: With the advancements in science and technology, it turns out that simulating the fatal shot that hit president Kennedy -and thus discovering the precise trajectory of the projectile- is indeed a lot harder than my one-liner computer program above, but A LOT easier than the last dice simulation. https://en.wikipedia.org/wiki/Simulated_reality