According to the Copenhagen Interpretation, and considering Young's double slit experiment: Is what interferes the mathematical wave function flowing out the two slits but the electron itself takes a well defined path? Anyhow, I need a clearer idea about the position definition or interpretation, does an electron have a specified one at a time? more than one? none or unknown? what does the standard model mean by considering the electrons (and all leptons) point particles? Does the standard model, in that, disagree with the formal interpretation of QM? If any of that is left unanswered formally, I ask you to share your personal ideas and answers that, you feel, most conveniently describe the answer.