In exophysics, reality simply obeys naive existentialism, that is, the existence of molecules and mechanics forms the reality of the surrounding world. In endophysics, reality is attributable to an interface between an observer and the rest of the world. This unique reality is comparable with the Kantian ‘fake reality’, and/or psychoanalysis, but was able to be characterized in more scientific manner by Otto Rössler: namely, as an objective reality of a subjective type, by, for example, introducing a new concept of second causality as assignment conditions that are the third ingredient that makes it possible for any motion to appear endophysically in addition to the initial conditions and laws in the Newtonian dynamics. Countable macroobjects may not be countable in a microscopic level. Thus indistinguishability becomes essential in endophysics, and this seemingly becomes possible that an origin of individuality can be derived using this line, because how to prescribe the situation of being distinguishable is an essence of endophysics.