Comment by hither_shores

3 years ago

> So an energetic system where the masses don't add up doesn't seem like an epoch defining mystery to me.

Bound states aren't really made of their constituents in a classical sense. A proton is a particular configuration of the quark fields (really it's more complicated than this), but not a simple sum of quark particle states. And in particular, its mass doesn't have to be the sum of the masses of particle states.