'Scientific advice to politics', the 'nature of expertise', and the 'relation between experts, policy makers, and the public' are variations of a topic that currently attracts the attention of social scientists, philosophers of science as well as practitioners in the public sphere and the media. This renewed interest in a persistent theme is initiated by the call for a democratization of expertise that has become the order of the day in the legitimation of research funding. The new significance of 'participation' and 'accountability' has motivated scholars to take a new look at the science...