R. J. Hankinson is a Professor of Philosophy and Classics at the University of Texas at Austin. Matyáš Havrda is a Senior Researcher at the Institute of Philosophy at the Czech Academy of Sciences.

• Introduction R. J. Hankinson and Matyáš Havrda; 1. 'Do I wake or sleep?' Galen, scepticism, and dreams Jonathan Barnes; 2. Galen's empiricist background: A study of the argument in On medical experience Inna Kupreeva; 3. Discovery, method, and justification: Galen and the determination of therapy R. J.Hankinson; 4. From problems to demonstrations: Two case studies of Galen's method Matyáš Havrda; 5. Galen's notion of dialectic Teun Tieleman; 6. The relationship between perceptual experience and Logos: Galen's clinical perspective P. N. Singer; 7. Galen against Archigenes on the pulse and what it teaches us about Galen's method of Diairesis Orly Lewis; 8. On sense perception: Galen in dialogue with Plato and the stoics Katerina Ierodiakonou; 9. Reason and experience in Galen's moral epistemology David Kaufman; 10. The Arabic Alexandrians' summary of Galen's On the therapeutic method Elvira Wakelnig; 11. What level of certainty can medical sign-inference reach? A discussion of Galen's demonstrative method in the Islamic world Pauline Koetschet.

'… a most valuable volume, incorporating contributions from most of the English-speaking authorities on Galen, on a topic of basic importance to our understanding of Galen as a practical physician as well as a (nominally) Platonic philosopher.' John Dillon, Bryn Mawr Classical Review