Ben Goldacre is a medical doctor and best-selling author of the book "Bad Science", which was shortlisted for the BBC's Samuel Johnson Prize for Non-Fiction recently. The book is a look at how you can simply apply the scientific method to successfully guard yourself against both mainstream and "alternative" medical scams, and debunk non-demonstrable claims, with some fairly scary examples. In this somewhat impromptu talk, Ben looks at how we could take some of the ideas in the book a good deal further.