A raised eyebrow, an inflection of the voice, a caustic remark dropped in the middle of a broadcast can raise doubts in a million minds about the veracity of a public official or the wisdom of a governmental policy.

A raised eyebrow, an inflection of the voice, a caustic remark dropped in the middle of a broadcast can raise doubts in a million minds about the veracity of a public official or the wisdom of a governmental policy.