Quote Originally Posted by Coinneach View Post
...but I found this interesting and had to wonder if I was the only one who had solved this problem years ago: don't add the butter.
Let's see, if the buttered side ALWAYS lands down, that would mean that the unbuttered side would NEVER land down. If neither side is buttered, that means both sides are the unbuttered side, and thus neither side will land down. Assuming the toast would never land on edge (after all, that's just silly), then the toast will never land and thus remain spinning.

I think you've just developed the perpetual motion machine.