[rad88]

The really implausible thing about reversing a broken egg is not that it works itself back into the "original" state, but that it takes the same energy back from the environment (thrown off as heat in the forward direction) and converts it perfectly into the needed work. Which goes against physical law and also is something it's hard to even visualize. The environment shoves heat at the thing in some very specific way and then it jumps back into nothing more or less than a whole egg. Hopefully it won't start oscillating.

This can be expressed in the language of entropy but it is essentially a thermodynamic principle. Carlo Rovelli expressed it in a way that I like:

> In order to leave a trace, it is necessary for something to become arrested, to stop moving, and this can only happen in an irreversible process -- that is to say, by degrading energy into heat. In this way, computers heat up, the brain heats up, the meteors that fall into the moon heat it; even the quill of a medieval scribe in a Benedictine abbey heats a little the page on which he writes. In a world without heat, everything would rebound elastically, leaving no trace.

[galaxyLogic]

Cool. So the fact that I can remember the past means some traces of energy dissipation are in my brain. Without energy dispersion we the people could not experience "time", whatever that "is".