@JustinThymetheSecond: There is a physical difference in composition between a live brain and when, a few seconds later, it is dead: namely the various local ion concentrations causing electric potentials (and possibly other mechanisms) constituting communication between neurons
@CharonME So you are saying that if we 3D print those ions back again the brain will come back to life? Basically, what you are saying is that the local ion concentrations are what determine the brain is dead. That is NOT a 'physical difference', that is the definition of 'brain death'.
Discussion on answer by Justin Thyme …
Discussion on answer by Justin Thyme …