To tell a plausible lie, children must be able to understand how others see things.

WSJ: How to Handle Little Liars

So they print money to tell themselves and us a lie, just as easy Fed policy and massive purchases of Treasury securities tell the government the lie that it is creditworthy.

FORBES: Why Interest Rates Tell Lies About Inflation, Growth And Just About Everything Else

"We go in and we tell a lie to the North Koreans, and I believe that's journalistically fine and proper, " he said, acknowledging that the North Korean government is now "very angry" about what happened.

CNN: SHARE THIS

She can describe a past incident and tell a lie, skills once thought to be exclusively human.

ECONOMIST: Language

To tell you I had expected this level of physical prowess when I signed up to write this story would be a blatant lie.

FORBES: Magazine Article

The lie which those subjects are asked to tell is a small one: they have to persuade Dr Langleben, or one of his assistants, that they are holding a particular playing card when often they are actually holding a different one.

ECONOMIST: Lie detection

So the problem may lie, not with the sender, but with a British reluctance to tell each other how good life can be.

BBC: Why are round-robin letters so annoying?

"The ability to have a strong moral compass, and know the difference between a lie you should tell and one you shouldn't is very important, " he says.

CNN: Books - Former CIA agent unveils secrets that made him 'Master of Disguise'