Abstract

Despite the substantial and important differences between Achinstein and Laudan, many historians of science would see little distinction between them. Both of these philosophers believe and strongly maintain that argumentation was a central aspect of the historical events involved in the establishment of wave optics. Contemporary historians would prefer to ask whether argumentation did much work at all - whether, that is, anyone ever actually persuaded anyone else to change a belief. I will attempt briefly to show that issues of skilled knowledge, tacit understanding, and novel instrumentation, rather than straightforward assertions based on the overt structure of the contending theories, offer a better way to understand what took place.