This book provides philosophers and logicians with a broad spectrum of views on contemporary research on the problem of deduction, its justification and explanation. The variety of distinct approaches exemplified by the single chapters allows for a dialogue between perspectives that, usually, barely communicate with each other.

The contributions concern (in a possibly intertwined way) three major perspectives in logic: philosophical, historical, formal. The philosophical perspective has to do with the relationship between deductive validity and truth, and questions the...

This book explores innovative applications of conceptual engineering to specific case studies beyond philosophy. Conceptual engineering is described a method for reframing philosophy as a problem-solving method of direct relevance for, and bearing on, areas of practical concern. Based on lectures at the Conceptual Engineering Online Seminar 2020/2022 by leading philosophers, it opens new perspectives on a wide array of topics in relation to issues of high scientific, social, and political significance. This book is a must-read for professional philosophers, experts in metaphilosophy or...

This book celebrates and explores some philosophical issues raised by the work of Alan Weir, who is Professor Emeritus at the University of Glasgow, having previously held positions at the Universities of Oxford, Edinburgh and Queen’s, Belfast. In a number of areas, Weir has elaborated strikingly original views which involve a radical departure from the mainstream. These include formalism in the philosophy of mathematics, and as well as naïve set theory, with a universal set, and a naïve theory of truth. In contrast to other contemporary defenders of the latter two...

This volume is a collection of essays related to the work of Professor Yuriy Vasilievich Ivlev, a distinguished Russian logician and philosopher renowned for his expertise in many-valued and modal logics. Notably, his groundbreaking work on quasi-matrices for logics, now recognized as non-deterministic matrices and non-deterministic semantics, emerged in the 1970s. From a philosophical standpoint, Ivlev’s research delves into the formal analysis of indeterminacy, offering a logical framework to understand how sequences of indeterminate events can yield determinate outcomes. The...

This edited volume is the first systematic philosophical investigation of the complex and multifarious relationships between dreaming and memory. Featuring fifteen contributions by leading researchers, it explores a range of issues that arise when dreaming and memory are considered together. What does one remember when one remembers what one dreamt, and what is it for a memory of a dream to be accurate? What are the phenomenological, cognitive, and epistemic similarities and dissimilarities between dreaming and remembering? How does the self figure in dreams and memories? The book...

This book offers the first sustained investigation of the phenomenon of retraction - the “taking back” of the conventional or deontic effects of a previous speech act - bringing together issues and solutions from the semantics of perspectival expressions and from the framework of Speech Act theory. It addresses questions that have been at the center of lively debates in philosophy of language and linguistics, but also draws out some of the ramifications these questions have for certain debates in the logic of discourse, philosophy of mind or experimental philosophy.

Many times,...

This book is a collection of essays that offer original logical and philosophical investigations into the century-long endeavor to understand paradoxes. It bridges the gap between the two most prominent traditions in the analysis of paradoxes: the truth-theoretic and proof-theoretic approaches. The truth-theoretic tradition stems from Alfred Tarski's solution to the semantic paradoxes, while the proof-theoretic tradition dates back to Dag Prawitz's analysis of set-theoretic paradoxes in terms of structural proof theory. Rather than viewing these traditions as competing perspectives, this...

This book offers a collection of papers on focal themes in truth research, including minimalism, pragmatism and pluralism, and philosophical logic. It further provides valuable hindsight with contemporary perspectives on the works of Frege, Wittgenstein, Ramsey, Strawson, and Evans on truth, and it features recent discussions on the role and value of truth in politics and political discourse. The collection is based on groundbreaking presentations hosted by the Virtual International Consortium for Truth Research (VICTR), including talks given at the TRUTH...

This book shows that the assumption that classical logic is essentially a bivalent (i.e., 2-valued) logic, a logic of truth and falsity, is an incorrect and harmful conception. Classical logic is certainly a Boolean logic, and the smallest (non-degenerate) Boolean algebra is the 2-element Boolean algebra; however, there are numerous Boolean algebras that have more than 2 elements, such as the 4-, 8-, 16-, ..., infinite-element Boolean algebra, and they all work equally well for the semantics of classical logic. Contrary to the popular thought, there is such a thing as classical (or...