1. States the position and momentum of a particle cannot be simultaneously measured with arbitrarily high precision. This is a crucial concept that is a part of quantum mechanics
2. The modern-day version states to never judge a girl's looks from a distance greater than or equal to 50 feet.
The uncertainty principle seems very straightforward.
Man, I was drunk last night at the party and the uncertainty principle totally slipped my mind. I swore he looked like a girl.