Why do you draw the line here, at QM, as a boundary of knowledge? This may be the case, and is a common opinion, but why is this special, compared to various other theories we have in physics and other sciences?
Historically, this line of thinking is common in science. You might be right here; science has advanced far in the last century, but I urge you to exercise skepticism that we've really hit the bottom. Nearly all claims of this type historically have been wrong!
Historically, this line of thinking is common in science. You might be right here; science has advanced far in the last century, but I urge you to exercise skepticism that we've really hit the bottom. Nearly all claims of this type historically have been wrong!