As I used to tell my students, when it comes to physical concepts, many times a certain effect just IS and trying to dissect it will only result in confusion (and this has nothing to do with the don't-question-authority concept - this is just the universe at work). Some of the simplest concepts are the basis of many of our most complicated technologies. Common example: the binary numbering system. Just two digits, 1 and 0, representing zero volts and five volts enable people from widely-separated locations around this planet to discuss this issue on this forum, or send a robotic probe to Jupiter that can make many decisions on its own. But still, no matter how complicated the system they are part of, that 1 and that 0 just are.