"What is most deceptive is not when you lie outright, but when you tell the truth, but not the whole truth. The most important question you can ask of any presentation, not necessarily 'oh is this person lying to me', but 'what isn't this person telling me'. Because if the person lies to you, you can check up on that. But if a person leaves something out, you have no way of checking - you don't know - what has been omitted".
Howard Zinn, interviewed by Truth in Numbers.