Thanks for the reply! So what I don't understand is, in your explanation, you appear to tacitly assume the rest of the brain matter is (in some sense, maybe statistically) "[mostly] independent" from the electrons we're measuring. As if, maybe they were behaving independently before, and only now have become a teeny tiny epsilon bit entangled due to the entangled electrons they're interacting with. But I don't understand what this assumption is based on; it seems to directly contradict the Big Bang idea. Presumably we all came from the same Big Bang, and were all completely entangled with each other at that point, with everything tied directly to everything else. Why should it be that after the particles got away from each other, this would stop being the case? I just don't understand. To me, if literally everything in the universe was entangled at some point, it will be forever—to my understanding, there's no way to "reduce" entanglement unless you have a source of particles with "less" entanglement to interact with, right? Which I understand would not be the case in this universe, because everything would be fully entangled with everything else.