This book attempts to explain the functioning of the combinatorial, semi-mechanical demonstrative techniques of Ramon Llull's 'Art', how it began as an apologetic instrument, how it developed through two main stages, and how it ended trying to reformulate key aspects of medieval Aristotelian logic.

This book describes how natural philosophy and exact mathematical sciences joined together to make the Scientific Revolution possible.

This interdisciplinary work is a collection of major essays on reasoning: deductive, inductive, abductive, belief revision, defeasible (non-monotonic), cross cultural, conversational, and argumentative. They are each oriented toward contemporary empirical studies. The book focuses on foundational issues, including paradoxes, fallacies, and debates about the nature of rationality, the traditional modes of reasoning, as well as counterfactual and causal reasoning. It also includes chapters on the interface between reasoning and other forms of thought. In general, this last set of essays represents growth points in reasoning research, drawing connections to pragmatics, cross-cultural studies, emotion and evolution.