#428 – Sean Carroll: General Relativity, Quantum Mechanics, Black Holes & Aliens

8124.929 - 8146.082 Sean Carroll

I almost never use the word illusion. Illusion means that there's something that you think you're perceiving that is actually not there. Like an oasis in the desert is an illusion. It has no causal efficacy. If you walk up to where the Oasis is supposed to be, you'll say you were wrong about it being there. That's different than something being emergent or non-fundamental, but also real.