American traditions and the American ethic require us to be truthful, but the most important reason is that truth is the best propaganda and lies are the worst. To be persuasive we must be believable; to be believable we must be credible; to be credible we must be truthful. It is as simple as that.
The speed of communications is wondrous to behold. It is also true that speed can multiply the distribution of information that we know to be untrue.
To be persuasive we must be believable; to be believable we must be credible; credible we must be truthful.
Most truths are so naked that people feel sorry for them and cover them up, at least a little bit.