Henry Abbott at TrueHoop picked up on a policy that Colin Powell had when he was the chairman of the Joint Chiefs of Staff. Here’s Mike McConnell repeating what Powell told him:
Look, I have got a rule. As an intelligence officer, your responsibility is to tell me what you know. Tell me what you don’t know. Then you’re allowed to tell me what you think. But you always keep those three separated.
Abbott rightly comments that that’s good advice for journalists and bloggers.