sorry for deleting the comment, liked David Z's answer but got downvoted heavily, so i didn't want to bother this thread with philosophical discussions. But now

sorry for deleting the comment, liked David Z's answer but got downvoted heavily, so i didn't want to bother this thread with philosophical discussions. But now after seeing further discussions half a day later, I think I did wrong. So thanks for great discussions. i was pointing out a problem you may read in feynman's and gerard 't hooft's writings and early quantum physicists, when it comes to interpreting quantum phenomena. What is is? do Mathematical entities have outside existence? Kant, Brentano, Frege, Heidegger, empiricists also touched this issue. ps: I'm a physics graduate and studied/did lab work with CERN neutrino oscillation researchers, so I like such discussions wherever they pop up.