1. If the measurement is done anywhere after the slits and before the screen, do I understand correctly that it does not create interference pattern? 2. Should screen be thought of as a kind of measuring device? 3. So electron is what? Floating probability? That sometimes can be localized in space (e.g. when measured) and at that time displays particle-like properties? 4. OK, so when it's measured it behaves like particle. But why does it not go back to wave state after measuring point? Or maybe I should not think of such thing as "before" or "after" measuring point in this experiment, and consider there is "no time" here?