[roguecoder]

I have worked on classified systems. We would have rules drawn up for what was classified and what was not. If you can draw up clear rules with no edge cases, no missed possibly-leaky information, where decisions are unambiguous and 20 people would always make exactly the same decision for every piece of information, you should go file a patent for that method because it is a truly novel invention. And we were only covering a single tiny domain of data, not trying to build a rules set for all possible data that could ever exist.