Wow. Clean slate! I like the format! And I've got a question. In elementary physics, it is said that the neutron can "sorta" be thought of as a proton plus an electron together. The mass of the neutron is slightly higher than a proton, by approximately the mass of an electron; in beta decay, a neutron decays into a proton, electron and neutrino; the neutron is neutral, since the two charges cancel. My question is: I know it is incorrect to say that a neutron is a "Proton plus Electron and Neutrino," but why is it wrong to say this? I'm familiar with the HUP explanation that since the mass of an electron is so small, then it's position is too vague to be contained in the tiny neucleus, but is there some other reason?