I'm certainly good for nothing however it's never really been good for me - which is a shame because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns – the ones we don't know we don't know. And if one looks throughout the history of this forum and other free forums, it is the latter category that tend to be the difficult ones.
I think I've strayed off topic!!