How. Not a particularly Scottish word you may think, which is true, although it is used in Scotland in a way that I haven’t come across anywhere else: instead of why. So when someone says I’m going home now, it’s quite common for someone else to reply How? The correct answer is not By bike or On foot, but rather Because I’m knackered. Similarly, the question How no? actually means 'why not?' Why we don’t just say Why not? is beyond me, but I guess it’s yet another reason why we are such a wonderful bunch of people.