This time we're tracing the etymology of words tied to lies and deceit, beginning with research into how children learn, or fail, to tell untruths, and a look at words of honesty such as blunt and authentic, the latter etymologically meaning 'self doing'. Fake and bogus grew out of criminal slang, with bogus first referring to a machine that produced counterfeit coins. Charlatan describes someone full of empty talk, and its origins may be more obvious to Spanish speakers, much like Irish speakers might recognise how phony connects to a jewellery scam. The origin of Pinocchio's name is right in front of us, and an ancient story has left us with a phrase that still warns against lying today.