In this book, Nicholas Rescher seeks to settle debates about whether Galen originated the fourth figure of the categorical syllogism. For his definitive evidence, Rescher examines Arabic sources, one of which is “On the Fourth Figure of the Syllogism” by twelfth-century mathematician Ibn al-Salah, and is reproduced here in Arabic with an annotated English translation. Rescher also explores the history and importance of the syllogistic figures in the evolution of logic in Islamic and European cultures, and discusses the debate about the actual number of syllogistic figures.

Rodolphe Gasché’s commentary on Deleuze and Guattari’s last book, What Is Philosophy?, homes in on what the two thinkers define as philosophy in distinction from the sciences and the arts and what it is that they understand themselves to have done while doing philosophy. Gasché is concerned with the authors’ claim not only that philosophy is a Greek invention but also that it is, for fundamental reasons, geophilosophical in nature.

Gasché also intimates that, rather than a marginal issue of their conception of philosophy, geocentrism is a central dimension of their thinking. Indeed, Gasché argues, if all the principal traits that constitute philosophy according to What is Philosophy?—autochthony, philia, and doxa—imply in an essential manner a concern with Earth, it follows that what Deleuze and Guattari have been doing while engaging in philosophy has been marked by this concern from the start.