So macros are things which change with difficulty. It’s that simple, things that change with difficulty. And I’ve been defining micros as things that change more easily. So they’re both defined very simply and they are defined in a way that you could make something a micro because you think of it that way even though it took you five years of concerted effort it actually unfolded fairly systematically and so you think of that as a micro. Whereas a macro typically you work on it and you think you’re in it and you might not get anywhere and then you work further and you start to feel like you’re getting somewhere and you’re back at the beginning or you think you’ve solved it and then you haven’t and it’s just that kind of thing.