AMA | September 2024

8803.347 - 8823.078 Sean Carroll

Any system that can be described classically could also be described quantum mechanically. But... there are some systems that you don't need quantum mechanics to talk about. I'm emphasizing this because it gets fuzzy sometimes. Sometimes you get the impression for big things, they obey the rules of classical mechanics. For small things, they obey the rules of quantum mechanics.