What is at stake in modern thinking, at first expressed by René Descartes, can be characterized as the attempt to overcome scepticism. After all, scepticism threatens to be the result when the self-evident certitudes of religious belief are undermined. With his essay The Relation of Scepticism to Philosophy (1802), the young Hegel already participated in this debate. In this book, Ioannis Trisokkas not only develops a conscientious analysis of Hegel’s argumentation against Pyrrhonian scepticism, but also argues that Hegel has elaborated in his Science of Logic a theory of judgement in which scepticism can be definitely refuted. There are three important reasons to include this work in our series Critical Studies in German Idealism. First it highlights the current relevance of one of the central topics in Hegel’s thinking. In our globalized world with its many cultural and philosophical traditions, once again scepticism seems to be the outcome of a world-wide debate, such that it seems to make sense to rethink Hegel’s most fundamental arguments against scepticism. Secondly, the book represents an important position within contemporary Hegel-research by stating that not Hegel’s Phenomenology of Spirit, but rather his Science of Logic justifies the cognitive standpoint of reason against scepticism. Thirdly, the work is the first complete book in the English language which addresses these problems.