Susanna Siegel

What is the role of conscious experience in action and cognition? John Campbell’s answer in Reference and Consciousness begins from ideas he thinks are part of common sense: When our actions are directed toward particular things—as when we grab our keys, or lift forks from plates—these actions are guided by visual experience. We see where to reach for keys or fork, and only then are able to do it. Similarly for the case of cognition: in cases where experience is limited, such as blindsight, cognition suffers as well. Consider a blindsighter who can reliably point to the person a normally sighted speaker is talking about whenever she uses the expression ‘that woman’. Even if the blindsighter points correctly all the time, she does not understand the speaker’s use of ‘that woman’. Common sense thus finds a distinctive role for conscious experience in action and cognition, in opposition to the view that everything essential to action and cognition could proceed perfectly well without any conscious experience at all. In this way, common sense opposes epiphenomenalism about experience—the view that experience has no causal role to play with respect to cognition or action.

In The Problem of Perception, A.D. Smith’s central aim is to defend the view that we can directly perceive ordinary objects, such as cups, keys and the like.1 The book is organized around the two arguments that Smith considers to be serious threats to the possibility of direct perception: the argument from illusion, and the argument from hallucination. The argument from illusion threatens this possibility because it concludes that indirect realism is true. Indirect realism is the view that we perceive mind-independent ordinary objects, but can only do so indirectly, by perceiving mind-dependent objects: objects whose existence depends on being perceived or thought about. The argument from hallucination draws a similar conclusion: if we perceive mindindependent ordinary objects at all, then our perception of them is indirect in the same way. In responding to these arguments, Smith develops an account of percep- tual consciousness. Perceptual consciousness is a kind of experience, distinct from what Smith calls ‘mere sensory experiences’, or equivalently, ‘mere sensation’. Perceptual consciousness is experience that is properly percep- tual, in which one has the phenomenology of perceiving things in the external world (including one’s body) that exist independently of one’s mind. Perceptual consciousness on its own does not suffice for actually being in perceptual contact with mind-independent reality, although it suffices for it to seem as if one i s . It follows that perceptual consciousness does not suffice for direct perception of ordinary objects, or for direct realism. Nevertheless, Smith holds that the correct account of perceptual consciousness is a crucial element in blocking the arguments from illusion and hallucination, and therefore in supporting the possibility of direct perception. This is an extraordinarily engaging book. Within a single, unified narrative, one encounters the views of many philosophers—Husserl, Fine, Broad, Sextus Empiricus, Loar, Schopenhauer, Meinong, Burge, Dilthey, Russell, Dennett, Sartre, O’Shaughnessy, Evans, Berkeley, Craig, Brentano and many....

What do we see? We are visually conscious of colors and shapes, but are we also visually conscious of complex properties such as being John Malkovich? In this book, Susanna Siegel develops a framework for understanding the contents of visual experience, and argues that these contents involve all sorts of complex properties. Siegel starts by analyzing the notion of the contents of experience, and by arguing that theorists of all stripes should accept that experiences have contents. She then introduces a method for discovering the contents of experience: the method of phenomenal contrast. This method relies only minimally on introspection, and allows rigorous support for claims about experience. She then applies the method to make the case that we are conscious of many kinds of properties, of all sorts of causal properties, and of many other complex properties. She goes on to use the method to help analyze difficult questions about our consciousness of objects and their role in the contents of experience, and to reconceptualize the distinction between perception and sensation. Siegel's results are important for many areas of philosophy, including the philosophy of mind, epistemology, and the philosophy of science. They are also important for the psychology and cognitive neuroscience of vision.

The Elements of Philosophy: Readings from Past and Present is a comprehensive collection of historical and contemporary readings across the major fields of philosophy. With depth and quality, this introductory anthology offers a selection of readings that is both extensive and expansive; the readings span twenty-five centuries. They are organized topically into five parts: Religion and Belief, Moral and Political Philosophy, Metaphysics and Epistemology, Philosophy of Mind and Language, and Life and Death. The product of the collaboration of three highly respected scholars in their fields - Tamar Szabó Gendler, Susanna Siegel, and Steven M. Cahn - The Elements of Philosophy also includes introductions from the editors, explanatory footnotes, and a glossary.