Perceptual Experience and Perceptual Knowledge (original) (raw)

Experience and the Foundations of Perceptual Knowledge

The Blackwell Companion to Epistemology (Third Edition), 2025

In this paper, I provide new foundations for experientialism about perceptual knowledge, the view that all perceptual knowledge derives from experience. §1 introduces the basic template for experientialism about perceptual knowledge and considers how recent work on perceptual justification encourages giving special attention to less intuitive ways of filling in the template. §2 and §3 draw attention to ways of filling in the template that are more compelling, including versions from the history of epistemology that are still taken seriously elsewhere (e.g., in philosophy of mind and cognitive science). §4 spotlights one neglected kind of approach—anti-Humean experientialism—and highlights some of its attractive features. §5 concludes by noting how anti-Humean experientialism dissolves an influential problem for experientialism that originates in Sellars (1956).

Perception and Reason

Philosophy and Phenomenological Research, 2001

Discusses the role of conscious experiences in the acquisition of empirical knowledge. Most epistemology of perception takes a person's possession of beliefs about the mind-independent world for granted and goes on to ask what further conditions these beliefs must meet if they are to be cases of knowledge. I argue that this approach is completely mistaken. Perceptual experiences must provide reasons for empirical beliefs if there are to be any determinate beliefs about particular objects in the world at all. So there are epistemic requirements upon the very possibility of empirical belief. The crucial epistemological role of experience lies in its essential contribution to the subject's understanding of certain perceptual demonstrative contents, simply grasping which provides him with a reason to endorse them in belief. I explain in detail how this is so; defend my position against a wide range of objections; compare and contrast it with a number of influential alternative views in the area; and bring out its connection with Russell's Principle of Acquaintance, and its consequences for the compatibility of content externalism with an adequate account of self-knowledge.

Perceptual Knowledge and the Metaphysics of Experience

The Philosophical Quarterly, 2008

There is a long-standing tradition in philosophy that certain metaphysical theories of perceptual experience, if true, would lead to scepticism about the external world, whereas other theories, if true, would develop a non-sceptical epistemology. I investigate these claims in the context of current metaphysical theories of sense-perception and argue that choice of perceptual ontology is of very limited help in developing a non-sceptical epistemology. Theorists who hold that perception is an intentional state have some advantage in explaining how perceptual experiences serve as justifying reasons for empirical beliefs. Alston and others have argued that a successful defence of a contemporary version of naïve realism would secure further epistemological advantages. I argue that this is not the case. A complete explanation of experience's reason-giving power involves factors beyond the metaphysical nature of experience.

The Real Epistemic Significance of Perceptual Learning

Inquiry: An Interdisciplinary Journal of Philosophy, 2018

In “The Epistemic Significance of Perceptual Learning” (this issue) Elijah Chudnoff argues that cases from perceptual learning show that perception not only generates reasons for beliefs but also preserves those reasons over time in perceptual learning cases. In this paper we dispute the idea that perceptual learning enables the preservation of perceptual reasons. We then argue for an alternative view, viz. the view that perceptual learning is epistemically significant insofar as it modifies our perceptual system in such a way as to make us capable of perceiving subtle low-level properties (e.g., lightness) and high-level properties (e.g., chess configurations). Acquiring the capacity to perceive these properties is what enables us to achieve expertise in a variety of subject matters (e.g., chicken sexing, chess playing, and language fluency). Along the way, we argue against two main points in Chudnoff's paper. The first is that, pace Chudnoff, perceptual learning does not result in the acquisition of new facts. It only results in the acquisition of a new perceptual capacity. The second is that experiences resulting from perceptual learning can always serve as immediate justifiers of beliefs and hence do not need supporting background information in order to serve as reasons.

Perceptual Experience and Empirical Reason

Analytic Philosophy

King's College London 1 There are of course cases in which a person sees that o is F without seeing o at all: for example, when a person sees that her neighbour is home by seeing his car in the drive, or sees that her best friend is not at a party that she is attending. But I take those cases in which seeing o is integral to seeing that o is F as basic throughout what follows.

The Epistemic Significance of Perceptual Learning

First impressions suggest the following contrast between perception and memory: perception generates new beliefs and reasons, justification, or evidence for those beliefs; memory preserves old beliefs and reasons, justification, or evidence for those beliefs. In this paper I argue that reflection on perceptual learning gives us reason to adopt an alternative picture on which perception plays both generative and preservative epistemic roles.

The Epistemology of Perception

1 We focus on the visual case, leaving it to the reader to consider how the discussion generalizes to other modalities. 2 concerned how the transition from introspective beliefs to external--world beliefs could be rational. 2 In this entry, we assume without argument these positions are mistaken. We begin from the assumption that experiences (such as the one you have when you see the mustard) can justify external world beliefs about the things you see, such as beliefs that the mustard jar is in the fridge, and that the justification experience provides does not have to rely on justification for introspective beliefs. From now on, we often let it remain implicit that we are talking about external world beliefs, when we talk about the kind of beliefs that experiences justify. 3 Our main question is this: what features of experiences explain how they justify external world beliefs? The grammar of the question might suggest that experiences suffice all by themselves to provide justification for external world beliefs. But don't read this into the grammar of the phrase "experiences justify beliefs". We can distinguish between the claim that an experience can justify a belief that P, and the claim that an experience can justify a belief that P without help from other features it only contingently has. We clarify our question further in Part I, where we explain why we have chosen this point of departure, and highlight a range of theses about the role of experience in providing different types of justification. In Parts II and III, we consider the role of features of experience falling into two broad categories: constitutive features of experience, including its phenomenal character, its contents, its status as attentive or inattentive (sections 3--7); and causal features of experience such as its reliability, and the impact of other mental states on its formation (sections 8--10). Along the way, we discuss the relationships between visual experience and seeing (sections 1 and 8), and we contrast perceptual justification and perceptual knowledge (section 9).

The Epistemic Force of Perceptual Experience

What is the metaphysical nature of perceptual experience? What evidence does experience provide us with? These questions are typically addressed in isolation. In order to make progress in answering both questions, perceptual experience needs to be studied in an integrated manner. I develop a unified account of the phenomenological and epistemological role of perceptual experience, by arguing that sensory states provide perceptual evidence due to their metaphysical structure. More specifically, I argue that sensory states are individuated by the perceptual capacities employed and that there is an asymmetric dependence between their employment in perception and their employment in hallucination and illusion. Due to this asymmetric dependence, sensory states provide us with evidence.