A viewpoint of entropic measurement of a theory as it’s measure of fundamentality is proposed. This idea came about from philosophical musing with Buddhist fundamental principle of dependent origination. Information being kept track of by the theory, the principles which compacts the form of the theory, and the range of validity of the theory are examined with examples in Physics. These form the basis of measuring a theory’s entropy. A map of physics theories and principles is drawn out to provide the big picture of fundamentality. The implications of such a viewpoint is listed out and is found to be very useful. In particular, the search for the theory of everything can be known to be found when the second law of thermodynamics is absorbed by the theory and it keeps track of every possible information, leaving nothing to coarse graining. It is up to the work of science to show if reductionism is true by rigorous linking up of all knowledge down to Physics. Failing that, each field of knowledge can be said to have their own fundamental theories.
Ng Xin Zhao