Perhaps there are many levels to understanding and knowledge? It's not a binary thing. Models can be correct in a particular domain of application, but incorre

Perhaps there are many levels to understanding and knowledge? It's not a binary thing. Models can be correct in a particular domain of application, but incorrect outside of those constraints. Progress is made by determining the constraints that define the domain of applicability for a given model, and then trying to find new models that are valid beyond those constraints [1]. For fundamental physics, we may have reached the edge of the current "level". Our results at this level seem to have a very wide domain of applicability. Who knows how long it will take to make a fundamental breakthrough that will really shake things up and deepen our understanding... [1] A concrete example: Newton's model of gravity is not "wrong" or "false". Its domain of applicability and validity is simply much more restricted than the models developed by Einstein. Interestingly and perhaps unsurprisingly, many common phenomena that humans care about fall squarely within the area where Newton's models are quite valid and useful.