In Parts 1 and 2 (TOS forum Nos 2 and 3) it was demonstrated that time, mass, permeability and permittivity are relative concepts originating in the human imagination and it was postulated that they do not necessarily require units of their own. This continues to suggest that a simpler system of fundamental units could be useful to perform serious science. Unless we are willing to make some changes, necessary changes, science as it is done today is unnecessarily complicated, and therefore ambiguous. This seems unacceptable to this passionate scientist.