Uncertainty Principle
Heisenberg was all, 'Hey, you can't know where something is if you don't measure it,' but what if you're measuring it wrong?
Like, what if your measurement tool is, like, totally off?
Or what if you're just, like, totally lost in the moment?
It's like, you know, Schrödinger's cat is all, 'I'm here, I'm not here, I'm here and not here, no, wait, I'm just a thought experiment.'
Quantum Foam is all, 'You know what, let's just make up some rules and see what sticks.'