One of my father's saying is that from drinking to much you are always coming back to your senses, but from stupidity, hardly! That is my conclusion also after trying to explain for some time to some stupid persons (sorry that for trying to explain them for such a long time without different results I have put myself in the same category of stupidity, at least mine was temporary, and I have the excuse of a professional deformation of some generations of teachers in my family) some simple concepts and one simple recommendation: don't try to apply it to me! For explaining in so many orthodox or un-orthodox...