I must say that there is a lot going on in the world that if you look closely seem to cast doubt on the core concepts of mass and forces.
For instance the four forces (Gravity, Electro-Magnetism, Strong, Weak) do not seem basic, but rather seem to stem from Quantum Mechanics. What I mean is in Quantum Field Theory if you solve things like electrons going around a Helium atom you have a phase inside the equation which has to disappear before you get to an actual physical solution. But the fact that it is still there forces there to be three of the four forces,-- and maybe even Gravity.
Another thing I mentioned a few days ago is the infinite mass that always shows up in any particle. [I mean the bare particle by itself is a whirling conglomerate of infinite waves. The particle that is measure in the lab is not the bare particle. [I mentioned there that this seem to show a kind of Kant kind of idea that the actual "thing in itself" is hard to understand. At least it is not so simple. Hegel thought there is access to the "thing in itself" by means of a dialectical process.]
For instance the four forces (Gravity, Electro-Magnetism, Strong, Weak) do not seem basic, but rather seem to stem from Quantum Mechanics. What I mean is in Quantum Field Theory if you solve things like electrons going around a Helium atom you have a phase inside the equation which has to disappear before you get to an actual physical solution. But the fact that it is still there forces there to be three of the four forces,-- and maybe even Gravity.
Another thing I mentioned a few days ago is the infinite mass that always shows up in any particle. [I mean the bare particle by itself is a whirling conglomerate of infinite waves. The particle that is measure in the lab is not the bare particle. [I mentioned there that this seem to show a kind of Kant kind of idea that the actual "thing in itself" is hard to understand. At least it is not so simple. Hegel thought there is access to the "thing in itself" by means of a dialectical process.]