This is a book about how we see: the environment around us (its surfaces, their layout, and their colors and textures); where we are in the environment; whether or not we are moving and, if we are, where we are going; what things are good for; how to do things (to thread a needle or drive an automobile); or why things look as they do.The basic assumption is that vision depends on the eye which is connected to the brain. The (...) author suggests that natural vision depends on the eyes in the head on a body supported by the ground, the brain being only the central organ of a complete visual system. When no constraints are put on the visual system, people look around, walk up to something interesting and move around it so as to see it from all sides, and go from one vista to another. That is natural vision—and what this book is about. (shrink)

Both the psychology of perception and the philosophy of perception seem to show a new face when the process is considered at its own level, distinct from that of sensation. Unfamiliar conceptions in physics, anatomy, physiology, psychology, and phenomenology are required to clarify the separation and make it plausible. But there have been so many dead ends in the effort to solve the theoretical problems of perception that radical proposals may now be acceptable. Scientists are often more conservative than philosophers (...) of science. I end, therefore, as I began, with a plea for help. (shrink)

For centuries psychologists have been trying to explain how a man or an animal could perceive space. They have thought of space as having three dimensions and the difficulty was how an observer could see the third dimension. For depth, as Bishop Berkeley asserted at the outset of the New Theory of Vision (1709), “is a line endwise to the eye which projects only one point in the fund of the eye.” Space was its dimensions. It was empty save for (...) a collection of objects or bodies. For an observer, the objects were in different directions at various distances and the question was how these distances could be detected. For two hundred and fifty years we have tried to answer this question and failed. The explanations have been controversial, contradictory, and confused. (shrink)

John Locke is probably one of the highest-regarded English philosophers, and the first of the British empiricists. His ideas on the mind and consciousness have continued to resonate throughout philosophy and philosophical thought ever since An Essay Concerning Human Understanding first appeared in 1690. James Gibson's Locke's Theory of Knowledge and its Historical Relations was first published in 1917, and saw its fourth reprinting in 1968. Here, it is made available for the first time in paperback. This hugely detailed work (...) is an invaluable collation of Locke's theories, exploring his thoughts on the problems of knowledge, the formation of ideas, causality and the self. Furthermore, Gibson also provides an in-depth historical evaluation of the effects of these theories on contemporary philosophy as a whole, and on thinkers such as Descartes, Kant and Leibniz more specifically. As such, this book is a valuable reference work for any student of philosophy. (shrink)

The chapter presents Anselm’s incompatibilist account of human freedom within the context of his theodicy and presents two arguments against his account. Both arguments aim to show there is a genuine conflict between his account of freedom and the role of God’s grace in making agents just. The first argument, the problem of harmonization, highlights the conflict within the soteriological context where an agent changes from being unjust to being just. The second argument, the problem of just creation, highlights the (...) conflict within the context of the creation of agents prior to the presence of evil. Holding fixed his incompatibilist account and the necessity of divine grace, the upshot of both arguments is that Anselm must endorse a version of Pelagianism. (shrink)