Whitelists and Blacklists are not mutually exclusive.

If I had a mail room, and I specified that my division would accept mail only from the Malaysia division and the Philippines division, I could still blacklist all janitorial staff at the sending divisions, as well as specify that accounting department may only receive mail from third floor in Malaysia.

Additionally, I can specify that Programming staff may not use the 7th floor color copier, but that the programming dept. network admin can authorize exceptions.



About James Johnson

I am an amateur mathematician & political theorist who enjoys (occasionally cerebral) humor.
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