All theories are based on physical principles that are explained with metaphysical assumptions. Physical principles are the body of experimental mass, space, time, and gravity measurements that a theory tries to interpret. Metaphysical assumptions are hidden characteristics within a particular scientific experiment that can explain its measured values but are not subject to physical measurement. These assumptions are the four sole ideas of consciousness that our minds receive from the measuring instruments of our senses. Common sense is the perceived result that is shared by all our senses and measuring instruments.