Heisen- berg's principle of indeterminancy. The basic philosophy of the Newtonian system of the universe is closely connected with what is termed the principle of canonic conjugates. The fun- damental principle of the mechanical philosophy of nature is that it is possible to determine exactly (in principle if not in actual practice) both the position and the velocity of any body. Knowing this for each particle which enters into any change, as amotion, it is possible to calculate mathematically, that is exactly, just what will happen. The laws or physical equations that express the relations of the particles and bodies under different conditions are then assumed to be a"govern- ing" framework of nature to which all particular phenomena conform. Knowing volumes and momenta in aparticular case we can by the aid of fixed laws predict the subsequent course of events.