From Liberty:
The letters and numbers in the design are the equations for The Uncertainty Principle, also known as the Principle of Indeterminacy in Quantum Mechanics. This equation in physics means you can never know the position and momentum of a particle at the same time. If you know the momentum you can’t know the position, if you know the position you can¹t know the momentum. This means you can never know if the future is determined. So if you were stranded on a desert island you aren’t fated, you could escape. You are in charge of your own destiny.