About 6-9 months ago or so I try emphasizing the need to collect business rules with one of my colleagues. I tell them how it might take a few days to get the owners to define mutually exclusive and completely exhaustive terms, but doing so would immediately allow us to resolve all sorts of data quality issues. Well, naturally this gets ignored and then about a week or two ago the same person is wondering why they can't get consistent results when different people try to query the piece of shit "data system" that we have. Since they know I'm already leaving for another gig, I'm torn on whether or not to pull out the "I told you so..." card or to sit silently and listen to them piss and moan all day.