> Recently, GPT informed me that the strong force is really a tiny after-effect of the "QCD force" This is kind of just semantics. QCD describes both the force

> Recently, GPT informed me that the strong force is really a tiny after-effect of the "QCD force" This is kind of just semantics. QCD describes both the force binding quarks inside protons and neutrons, and the residual force binding protons and neutrons. This is all part of the Standard Model, which has been essentially unchanged for the last 50 years. The big theoretical challenge is to incorporate gravity into this picture, but this is an almost impossible thing to explore experimentally because gravity is very weak compared to the other 3 forces. That's why the Standard Model is so successful, even though it doesn't incorporated gravity. You might enjoy https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_p...