@catsalad reaching for a book could imply studying to be a hacker, not that you had already gotten the certUnless you were the author of said book, which would be comically bad (but likely small font and not an author photograph, not legible unless in their face)(Or the author of the O'Reilly ones) So devil's advocate that subtle hint would have gone over my head "oh, lots of security folks are studying for CISSP but haven't gotten it"Not that their lack of self awareness would have made a difference, just that tell is not as amazingly visible.