Tim Thornton

Tacit knowledge is the form of implicit knowledge that we rely on for learning. It is invoked in a wide range of intellectual inquiries, from traditional academic subjects to more pragmatically orientated investigations into the nature and transmission of skills and expertise. Notwithstanding its apparent pervasiveness, the notion of tacit knowledge is a complex and puzzling one. What is its status as knowledge? What is its relation to explicit knowledge? What does it mean to say that knowledge is tacit? Can it be measured? Recent years have seen a growing interest from philosophers in understanding the nature of tacit knowledge. Philosophers of science have discussed its role in scientific problem-solving; philosophers of language have been concerned with the speaker's relation to grammatical theories; and phenomenologists have attempted to describe the relation of explicit theoretical knowledge to a background understanding of matters that are taken for granted. This book seeks to bring a unity to these diverse philosophical discussions by clarifying their conceptual underpinnings. In addition the book advances a specific account of tacit knowledge that elucidates the importance of the concept for understanding the character of human cognition, and demonstrates the relevance of the recommended account to those concerned with the communication of expertise. The book will be of interest to philosophers of language, epistemologists, cognitive psychologists and students of theoretical linguistics.

L’ouvrage de Harry Collins Tacit and Explicit Knowledge caractérise la connaissance tacite à partir d’un certain nombre d’antonymes : explicite, explicitable qui est ensuite spécifié en explicitable par élaboration, par transformation, par mécanisation et par explication, et enfin, au niveau le plus fondamental, ce qui peut être communiqué via des « strings ». Mais son exposé brouille la distinction entre connaissance et ce sur quoi peut porter la connaissance, et il aboutit à un certain nombre de conséquences contre-intuitives. Ceci est la conséquence de son adoption des strings, à la place de l’usage des mots ou des signes, en tant que marqueur de ce qui est explicite, et je suggère que ceci peut provenir de sa réponse antérieure à la régression des règles de Wittgenstein.

Medicine involves specific practical expertise as well as more general context-independent medical knowledge. This raises the question, what is the nature of the expertise involved? Is there a model of clinical judgement or understanding that can accommodate both elements? This paper begins with a summary of a published account of the kinds of situation-specific skill found in anaesthesia. It authors claim that such skills are often neglected because of a prejudice in favour of the ‘technical rationality’ exemplified in evidence-based medicine but they do not themselves offer a general account of the relation of practical expertise and general medical knowledge. The philosopher Hubert Dreyfus provides one model of the relation of general knowledge to situation-specific skilled coping. He claims that the former logically depends on the latter and provides two arguments, which I articulate in the second section, for this. But he mars those arguments by building in the further assumption that such situation-specific responses must be understood as concept-free and thus mindless. That assumption is held in place by three arguments all of which I criticize in the next section to give a unified account of clinical judgement as both practical and conceptually structured and thus justified in the face of a prejudice in favour of ‘technical rationality’