Most of us probably think we know how causation works. If we flick the switch of the kettle, we will cause the kettle to boil. If we set up a line of dominoes, and knock over the first domino, we will have caused that domino to fall, which will cause the next domino to fall, and the next, and the next, and so on. In this episode, Dr Neil McDonnell – The Lord Kelvin Adam Smith Research Fellow of the University of Glasgow – discusses why talking about causation isn’t so simple, with Ruaridh Gilmartin and Arianna Clark.