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Unanswered: regarding codd's rules
they say oracle satisfies about 10 of codd's rules... who authenticates.... and how?
There are not many people qualified enough, or who understand enough to make statements regarding Codd's work. There are however, many people who make statements.
I'd love to think that in fifty years time, if I studied enough, that I might be able to make some of my own, but I doubt it.
You will meet many people who profess to understand, and many people who discount his work (or that of his successors).
Whilst it is not an answer to your question, I would recommend you talk to some guys who worked with him, Fabian Pascal and Chris Date can be found at www.dbdebunk.com