This may seem so blatantly obvious to us that it need not be mentioned, but to a lot of people I bet it is not obvious at al, and in fact may even be counter-ob

This may seem so blatantly obvious to us that it need not be mentioned, but to a lot of people I bet it is not obvious at al, and in fact may even be counter-obvious. https://www.youtube.com/watch?v=KtQ9nt2ZeGM https://www.youtube.com/watch?v=KtQ9nt2ZeGM