In a skilful argument based on Ayn Rand's theory of concepts, philosopher and physicist David Harriman here presents a groundbreaking solution to the problem of inductive generalisations and their relationship to the true state of being. The work of Ayn Rand has recently experienced a huge resurgence with her book Atlas Shrugged (Penguin, 2007) topping Amazon bestseller charts. Harriman here brings her philosophy to bear on the process of scientific discovery, opening it up to a whole new audience.