Errol Morris shares Seven Lies About Lying, principles about lies often assumed to be true but which Morris believes are false.
5. Lying will be punished. Perhaps. But not as often as truth-telling. Lying effectively in many situations is generally superior than telling the truth, because often we have to search our minds for the truth, whereas a good lie can be easier to produce (though of course caution is indicated if the lie can be easily unmasked). Invariably a skillful liar makes a calculation about his chances of being exposed and avoids situations where a lie can be revealed. Lying is punished only if it is detected. A more reasonable assessment would be that ineffective and unskillful lying is severely punished. No one is held in greater contempt than an unskilled liar.
Morris also solicited Ricky Jay's thoughts on a world without lying:
When you're talking about Kant and trust, it made me think of one of the ways I tell people about the con game. I say, "You wouldn't want to live in a world where you can't be conned, because if you were, you would be living in a world with no trust. That's the price you pay for trust, is being conned."