Alright, in logic, there must be a name given for what I call the "essence of logic" in a specific idea or argument or theory. I do not know if the science of Logic has a name for it. Probably not, and so, given this opportunity, I am going to call it the Essence of Logic. And it is best explained by example. The example in this case is rest- mass.
The photon has no rest-mass. The electron has a 0.5 MeV rest-mass. The electron can become a photon when it collides and forms a union with a positron and a photon can become a electron with positron in pair production. So we have the physics experiments that electrons can turn into photons and where photons turn into electrons, yet one has rest mass while the other has 0 rest mass.
So, we have a Logical Problem to solve and it is solved by the Essence of Logic. The Essence of Logic would say that the only means in which 0 rest mass becomes 0.5 rest mass is that 0 rest mass is not closed looped while 0.5 rest mass must have a leading edge that becomes a closed loop around itself.
Now in experiments, there is a concept that comes close to this Essence of Logic concept, in what is called Deciding Experiment. Physicists can execute all types of experiments to gain information, but a particular type of experiment eliminates almost all hypotheses except for one contending hypothesis. That is why it is called a Deciding Experiment. An example of a Deciding Experiment for the Big Bang, Steady State and Atom Totality hypotheses for Cosmology is the Cosmic Microwave Background Radiation CMBR. If CMBR exists, eliminates the Steady State hypothesis. If CMBR is blackbody, eliminates the Big Bang hypothesis and leaves only one hypothesis that is credible, the Atom Totality because only in a Cosmic cavity, can you have a blackbody CMBR.
Essence of Logic is larger of a concept than Deciding Experiment. Essence of Logic is part of the axiomatics of science, whereas a Deciding Experiment involves other objects in the environment, whereas logic is the rules of reasoning.
So I am satisfied I have discovered the ultimate meaning of rest mass, in that it is, by Essence of Logic, a closed loop of electric charge and magnetic monopoles. And 0 rest mass like a photon is a straight line in Euclidean flat geometry with no closed loops in its traveling wavefront.
I am satisfied with rest mass and will move on to spin and Space. I have a feeling that Space will be the toughest.
Google's archives are top-heavy in hate-spew from search-engine- bombing. Only Drexel's Math Forum has done a excellent, simple and fair archiving of AP posts for the past 15 years as seen here: