I don’t understand her point either. And for number 3, entropy for a single particle (as far as such a thing can be defined) is quite different from entropy for

I don’t understand her point either. And for number 3, entropy for a single particle (as far as such a thing can be defined) is quite different from entropy for a macroscopic system. I’m not sure it makes sense to say that particles decay “to reach a state of highest entropy”.