First Published in 1999. Routledge is an imprint of Taylor & Francis, an informa company.

We already have a distinction between the intension and extension of terms. This is not simply the distinction that is operative in philosophy of mind, body, and action. There, the concern is with things, and with a physicalistic or a mentalistic account of them. The physicalist says he supports an ‘extensional’ analysis of things, the mentalist an ‘intensional’. So, the physicalist says that, in the end, only ‘the extensional language of physical science’ will do in ontology. But, associating this physical-mental (...) dichotomy with the intension-extension distinction as applied to terms is misleading. The ontological issue is obscured by the association. An ontologist wants, like Spinoza or Berkeley, to know whetherthingsare extended or not, and in what respects. This question makes central the concept of space, or more generally of ‘field’, ‘domain’. Unfortunately, the same word ‘extension’ is used also for the spread or location of athingin space. To dissociate the extension of a term, a logical notion, from the ontological notion of the spatial status of a thing, I introduce the new word ‘extention’. This coinage correlates, not with the ‘intension’ of terms—the logical correlate of ‘extension’—but with ‘intention’, a word that fortunately already has common currency, and reeks with connotations that have logical ties with ‘consciousness’. So, from here on, we have two dichotomies: intension-extension applying to terms, and intention-extention applying to things. Since terms are things, both sorts of considerations are relevant to them, the logical one and the ontological. Only the latter applies to, say, stones or persons, since these are not linguistic terms. (shrink)

Lord Acton, in his letter to the contributors to the Cambridge Modern History, wrote: “By Universal History, I understand that which is distinct from the combined histories of all countries … and is not a burden on the memory but an illumination of the soul.” If we replace “history” by the more general term “knowledge,” we get the statement of an ideal cherished by the great men of every age—those lonely pioneers to whom book-learning is an intellectual gloom more treacherous (...) than the natural gloom of night, since it fools men into thinking that it is a light by which men can see. The pioneers in thought, or indeed in any field, have made a secret treaty with nature. They smile with her at the robed and tassled scholar who, “Bewundrung von Kindern und Affen,” can “lecture plausibly about anything and get himself admired by the less learned.” Those pioneers, those men who—as someone has said—have thought according to no one and have made the human race think according to them, see by an intuitive insight, an illumination of the soul. Einstein, in his prologue to Planck's book Where is Science Going?, writes: “There is only the way of intuition. … The state of mind which furnishes the driving power here resembles that of the devotee or the lover. The long-sustained effort is not inspired by any set plan or purpose. It arises from a hunger of the soul.” We have not quoted a poet, but the greatest of mathematical physicists. (shrink)

The human body is ?transmogrified? (caricatured) under physicalistic descriptions of it. These imply that it is a contingent fact that rational beings such as human persons have the sort of bodies they do have. (Or, that, say, baboons are not rational creatures.) The human body is ?transfigured? under a description that makes it necessary to the performance of rational functions, including speaking a language. Any view of the matter that excludes this notion, either by reduction to the physicalist treatment or (...) simple denial, is inadequate. (shrink)

'Material thing' is a two-level concept. In 'first-order extension' - the field of perceptual experience - it is a 'body' that may 'body forth' (show, express) a 'content', like the bodies of persons or pictures. In 'second-order extension' -the physical field or space - it is a 'physical object' whose micro-constitution is the target of the reference of theoretical terms or formulae. As such, it has no content - nothing to 'express'. In the description of a material thing in first-order (...) extension, terms are used whose reference is fixed by ostension. (The picture's pigment is cracked, the person's eyes are blue.) The reference of theoretical terms - to the material thing in second-order extension - is fixed by their interrelationships in the theory. (shrink)