Hume and the Perception of Spatial Magnitude

Abstract

Among the current topics in Hume scholarship witnessing an upsurge in attention, few can match the inherent complexities associated with his doctrine of space, that of ten neglected and occasionally maligned theory put forth in Book I, Part II, of the Treatise.Yet despite this increase in academie interest, Hume's concept of spatial magnitude — i.e., the spatial size or magnitude of visible and tangible figures — as opposed to his more generai notion of space, has not attracted the same degree of attention. Even if commentators agree that Hume took the idea of space to be an idea derived from ‘the impressions of color'd points, dispos'd in a certain manner’ (T 1.2.3.3), this fact does not teil us what measures the distance between these impressions (perceptions), or what psychological processes and empirical properties are involved in the act of determining size or magnitude. If one bears in mind that the concept of spatial magnitude is also intimately connected with the status of geometry, and the debate on whether Hume endorsed a synthetic or analytic a priori account of geometrical knowledge, the failure to study exhaustively Hume's concept of distance becomes all the more astonishing.