In the first theory it states that whatever we forget is indeed lost and it can not be found back.One advantage of this theory was that it better explained why, when lungs are installed in those who have died from lack of air, the revived have no memories and are all but mindless: "The shock of death perhaps reset all the mechanisms.
The second theory tells us that we are not really consuming air at all.Whatever air we draw from each pair of lungs is what goes out as well.The amount of air that I draw from each day's new pair of lungs is exactly as much as seeps out through the joints of my limbs and the seams of my casing, exactly as much as I am adding to the atmosphere around me; all I am doing is converting air at high pressure to air at low."We are just equalising the pressure in the universe from high pressure to low pressure.