You can't. If you want to zero the memory holding the initial values, you have to exchange it with some other memory. This is how current ('non'-reversable) com

You can't. If you want to zero the memory holding the initial values, you have to exchange it with some other memory. This is how current ('non'-reversable) computers work: exchanging junk data with the large number of known-value bits constituting a low-temperature and/or fixed-voltage environment via diffusion (eg, attaching a bit storage location to GND to clear it by diffusing its change into the GND bus + waste heat).