I went back and forth when deciding whether or not to post this article, you see - I play to win. I wanted to keep all the secrets to myself! :) ~Erin
In the game Rock, Paper, Scissors, two opponents randomly toss out hand gestures, and each one wins, loses or draws with equal probability. It's supposed to be a game of pure luck, not skill — and indeed, if humans were able to be perfectly random, no one could gain an upper hand over anyone else.
There's one problem with that reasoning: Humans are terrible at being random.