I think what Nanda meant was that the meta data is now secured along with access to the objects themselves, so you can't assume that any given user has access to any particular piece of meta data. At least that's how I read it.
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If most people are not willing to see the difficulty, this is mainly because, consciously or unconsciously, they assume that it will be they who will settle these questions for the others, and because they are convinced of their own capacity to do this. -Friedrich August von Hayek
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