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Moderator's note: this thread is a spin-off from https://www.physicsforums.com/threads/self-interference-in-double-slit-experiments.952744/
According to nonperturbative QCD, quarks and gluons don't exist and in nonperturbative QED with two spinors (e.g. proton and electron) hydrogen isn't composed of a proton and an electron.vanhees71 said:If you look at the history of our natural-science knowledge about matter, in physics there are two ways of investigations about the world. The one is to figure out the tinier and tinier building blocks of matter, starting from condensed matter, extracting molecules, atoms, stripping of the electrons, finding the nucleus, splitting it into protons and neutrons and finally finding out that these themselves consist of quarks or quarks and gluons, which according to todays knowledge seem to be the fundamental building blocks of all matter (together with the electrons forming the neutral atoms, molecules and matter around us).