1. No one is as smart as they think they are. Bunch of dumbass mofos!
2. It is NOT possible to make things idiot-proof. Even though idiots are stupid, they are VERY resourceful.
3. Murphy was an optimist. The glass isn't half-empty. It's empty. Any water you see is an optical illusion.
Borrowed from my friend Steve:
There are 3 kinds of people in the world: those who can count, and those who can't.