system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If I have a bag of Skittles and sort them by color, then mix them for an indefinite period of time, why will they never "re-mix" themselves back to being separated by color?

(Possibly too much explanation here...)
For example, you have 1,000 Skittles, 200 of each color, and sort them by red, orange, yellow, green and purple. If I mix them up, all the colors will intermingle. When you mix them up and take five samples of 200, there will be roughly the same number of red (or orange, yellow, etc.) in each of the five samples. 

Why is is that a random sample of those Skittles will never come up with 200 red in one sample, 200 yellow in another sample, and so on? Or could it work like that? My same question goes for a sample having, say, 100 yellow and 100 red. Isn't there technically a possibility that that will happen?
gpt
It is *physically possible* for such an event to occur. It is *nearly* statistically impossible for it to occur, meaning that while it's technically a possibility, the odds against it are so massive as to mean effectively the same thing as a practical impossibility.

Edit: clarified language a little.