The Stuff of Thought with Steven Pinker

Why do we often avoid speaking our mind? Does swearing have an evolutionary function? What do linguistic taboos do to your brain? How are new words born? Acclaimed author of The Language Instinct and How the Mind Works, Harvard psychologist Steven Pinker is a self-confessed verbivore. To him language offers a window into the human mind and how it works. He joins Natasha Mitchell in a feature interview to argue there's nothing mere about semantics.