Intuitively we can postulate the humans are more conscientious than a chicken, and the chicken is more conscientious than a bacteria, and the bacteria (maybe it can "feel" pain) is more conscientious than the thermostat (who probably is not conscientious in any way). But conscience is not really measurable, so, we can't be really sure if a rock is more conscientious than us, or than a fellow human is conscientious at all (p-zombies).