In a class I taught at Berkeley, I did an experiment where I wrote a simple little program that would let people type either “f” or “d” and would predict which key they were going to push next. It’s actually very easy to write a program that will make the right prediction about 70% of the time. Most people don’t really know how to type randomly. They’ll have too many alternations and so on. There will be all sorts of patterns, so you just have to build some sort of probabilistic model. Even a very crude one will do well. I couldn’t even beat my own program, knowing exactly how it worked. I challenged people to try this and the program was getting between 70% and 80% prediction rates. Then, we found one student that the program predicted exactly 50% of the time. We asked him what his secret was and he responded that he “just used his free will.”

For my fellow weird folks, if you've ever wanted to throw lots with alphabet tiles but never could find a Scrabble set to cannibalize, or you aren't of a crafting bent, or simply do not have the resources to make the requisite little bits of wood, Walmart is currently carrying a 100 piece set of wooden alphabet tiles suitable for anything your nefarious little heart desires to do. They aren't treated, which allows for application of materia if desired, or outright reworking/repainting if it gels for you. Ran a bit less than $4 at my local one, in the wood/craft section.