Uh, what? I posted the answer first but oh well. Maybe you didnt undersand "brackets".
I understood brackets perfectly well, I must have over looked your post because of how small it was in comparrison to the two around it (my bad).
Although, on second thought you should never have to use not like this. Just replace the = with <> and take out the not.
Yeah, I started using the <> just after making this thread. But what do you mean on never having to use not like this? I thought the evaluation was pretty straight forward.