The Incompleteness of Newtonian Mechanics

Newtonian mechanics as I understand it is based on this idea that the universe is kind of like clockwork. And Einstein in physics leaves a little bit more room for some of these other complexities that, that maybe aren't taken into account in Newton. Some people would say there's more room for woo. It's still an open question as to whether it's reasonable to talk about the real existence of an electron or, you know, that’s still an open conversation and not necessarily resolved as yet as far as I understanding it.