Quote Originally Posted by MadMojoMonkey View Post
Ultimately the position/momentum field for any particle is non-zero at all points in space.
This is poorly worded. I meant to say that the position field for any particle is non-zero over any volume. There are, in fact, sometimes, surfaces which have a zero probability of the particle being there, but no volumes.

The corresponding momentum field has positive, negative or zero values based on the orientation of the reference frame relative to the average velocity of the particle.

Quote Originally Posted by MadMojoMonkey View Post
That's another good question. I am quite curious myself. I'll get back to you on this.
working... working...
I have found the experiments that showed that protons and neutrons have internal structure (quarks and gluons). I have not found the reason why it is believed that the quarks and gluons do not have internal structure.

The thing that is daunting: Science is no good at proving a negative.