This work investigates intuitions' nature, demonstrating how philosophers can best use them in epistemology. First, the author considers several paradigmatic thought experiments in epistemology that depict the appeal to intuition. He then argues that the nature of thought experiment-generated intuitions is not best explained by an a priori Platonism. Second, the book instead develops and argues for a thin conception of epistemic intuitions. The account maintains that intuition is neither a priori nor a posteriori but multi-dimensional. It is an intentional (...) but non-propositional mental state that is also non-conceptual and non-phenomenal in nature. Moreover, this state is individuated by its progenitor, namely, the relevant thought experiment. Third, the author provides an argument for the evidential status of intuitions based on the correct account of the nature of epistemic intuition. The suggestion is the fitting-ness approach: intuition alone has no epistemic status. Rather, intuition has evidentiary value as long as it fits well with other pieces into a whole, namely, the pertinent thought experiment. Finally, the book addresses the key challenges raised by supporters of anti-centrality, according to which philosophers do not regard intuition as central evidence in philosophy. To that end, the author responds to them, showing that they fail to affect the account of intuition developed in this book. This text appeals to students and researchers working in epistemology. (shrink)

Perceptual modalities have been traditionally considered the product of dedicated biological systems producing information for higher cognitive processing. Psychological and neuropsychological evidence is offered which undermines this point of view and an alternative account of modality from the enactive approach to understanding cognition is suggested. Under this view, a perceptual modality is a stable form of perception which is structured not just by the biological sensitivities of the agent, but by their goals and the set of skills or expertise which (...) they are deploying at a given time. Such a view suggests that there is no such thing as an experience that is purely visual, auditory, or otherwise modal and that our attempts to understand consciousness and the mind must be conducted within a framework that provides an account of embodied, goal-directed adaptive coping with the world. (shrink)

With emotional motivation the organism prepares the body to obtain a goal. There is an anticipatory sensitization of the sensory systems in the body and the brain. Presynaptic facilitation of the sensory afference in the spinal cord is probably involved. In a second stage the higher centers develop an action image/plan to realize the goal, modifying the initial preparations in the body. The subject experiences the changes in the body as a feeling. Three empirical studies supporting this description are summarized. (...) This description of how feelings develop from emotion circuits is discussed from a phenomenological viewpoint. (shrink)

The emulation theory of representation is developed and explored as a framework that can revealingly synthesize a wide variety of representational functions of the brain. The framework is based on constructs from control theory (forward models) and signal processing (Kalman filters). The idea is that in addition to simply engaging with the body and environment, the brain constructs neural circuits that act as models of the body and environment. During overt sensorimotor engagement, these models are driven by efference copies in (...) parallel with the body and environment, in order to provide expectations of the sensory feedback, and to enhance and process sensory information. These models can also be run off-line in order to produce imagery, estimate outcomes of different actions, and evaluate and develop motor plans. The framework is initially developed within the context of motor control, where it has been shown that inner models running in parallel with the body can reduce the effects of feedback delay problems. The same mechanisms can account for motor imagery as the off-line driving of the emulator via efference copies. The framework is extended to account for visual imagery as the off-line driving of an emulator of the motor-visual loop. I also show how such systems can provide for amodal spatial imagery. Perception, including visual perception, results from such models being used to form expectations of, and to interpret, sensory input. I close by briefly outlining other cognitive functions that might also be synthesized within this framework, including reasoning, theory of mind phenomena, and language. Key Words: efference copies; emulation theory of representation; forward models; Kalman filters; motor control; motor imagery; perception; visual imagery. (shrink)

This paper reports on the Kuhnian revolution now occurring in neuropsychology that is finally supportive of and friendly to phenomenology – the “enactive” approach to the mind-body relation, grounded in the notion of self-organization, which is consistent with Husserl and Merleau-Ponty on virtually every point. According to the enactive approach, human minds understand the world by virtue of the ways our bodies can act relative to it, or the ways we can imagine acting. This requires that action be distinguished from (...) passivity, that the mental be approached from a first person perspective, and that the cognitive capacities of the brain be grounded in the emotional and motivational processes that guide action and anticipate action affordances. It avoids the old intractable problems inherent in the computationalist approaches of twentieth century atomism and radical empiricism, and again allows phenomenology to bridge to neuropsychology in the way Merleau-Ponty was already doing over half a century ago. (shrink)

This paper reports on the Kuhnian revolution now occurring in neuropsychology that is finally supportive of and friendly to phenomenology — the "enactive" approach to the mind-body relation, grounded in the notion of self-organization, which is consistent with Husserl and Merleau-Ponty on virtually every point. According to the enactive approach, human minds understand the world by virtue of the ways our bodies can act relative to it, or the ways we can imagine acting. This requires that action be distinguished from (...) passivity, that the mental be approached from a first person perspective, and that the cognitive capacities of the brain be grounded in the emotional and motivational processes that guide action and anticipate action affordances. It avoids the old intractable problems inherent in the computationalist approaches of twentieth century atomism and radical empiricism, and again allows phenomenology to bridge to neuropsychology in the way Merleau-Ponty was already doing over half a century ago. (shrink)

This paper considers where contemporary neuroscience leaves us in terms of how human consciousness fits into the material world, and whether consciousness is reducible to merely mechanical physical systems, or on the contrary whether consciousness is a self-organizing system that can in a sense use the brain for its own purposes. The paper discusses how phenomenology can be integrated with new findings about “neural plasticity” to yield new approaches to the mind–body problem and the place of consciousness as a causal (...) player in the physical world. By phenomenology, I mean simply any attempt to have introspective or reflective access to the meaning of our own conscious states, and to carefully take account of the notorious pitfalls of subjective introspection (often subsumed within the concept of “folk psychology” in the empirically oriented cognitive theory literature). (shrink)

Phenomenology and physiology become commensurable through a self-organizational physiology and an "enactive" view of consciousness. Self-organizing processes appropriate and replace their own needed substrata, rather than merely being caused by interacting components. Biochemists apply this notion to the living/nonliving distinction. An enactive approach sees consciousness as actively executed by an agent rather than passively reacting to stimuli. Perception does not result from mere stimulation of brain areas by sensory impulses; unless motivated organismic purposes first anticipate and "look for" emotionally relevant.stimuli, (...) brain-sensory processing is not accompanied by perceptual consciousness. To see a soccer ball requires looking for it in the right place. The sell-organizing, emotionally motivated agent instigates this looking-for activity. (shrink)

Mack and Rock show evidence that no consciousperception occurs without a prior attentiveact. Subjects already executing attention taskstend to neglect visible elements extraneous tothe attentional task, apparently lacking evenbetter-than-chance ``implicit perception,''except in certain cases where the unattendedstimulus is a meaningful word or has uniquepre-tuned salience similar to that ofmeaningful words. This is highly consistentwith ``enactive'' notions that consciousnessrequires selective attention via emotional subcortical and limbic motivationalactivation as it influences anterior attentionmechanisms. Occipital activation withoutconsciousness suggests that motivated search,enacted through the organism's (...) subcorticalmotivational functions, is needed beforevisual stimulation engenders consciousness.This enactive view – that searching for,rather than receiving or processing input isthe basis of consciousness – was slow ingaining acceptance lacking empirical evidenceof this kind, combined with thestimulus-response assumption that brain eventssubserving perceptual consciousness must resultfrom transformation of perceptual input ratherthan from the organism's self-regulatedactivity as manifested through subcorticalactivity. Implicit perception occurring withword priming is ``paradoxical'' according to Mackand Rock, suggesting late selection forattention after extensive unconsciousprocessing, while most trials involvingnonverbal rather than verbal images mightsuggest earlier selection, sinceunattended objects are unseen, apparently evenimplicitly. This paper argues that anteriorand subcortical motivational mechanisms play animportant role in early selection; posteriormechanisms then unconsciously enhance signals;if data survive early gating andcorticothalamic enhancement, then still further anterior-limbic loops motivatedlyactivate ``image schemas'' resonating withposterior nonconscious processing; at thatpoint, consciousness occurs. (shrink)

Enactivism has the potential to provide a sense of teleology in purpose-directed action, but without violating the principles of efficient causation. Action can be distinguished from mere reaction by virtue of the fact that some systems are self-organizing. Self-organization in the brain is reflected in neural plasticity, and also in the primacy of motivational processes that initiate the release of neurotransmitters necessary for mental and conscious functions, and which guide selective attention processes. But in order to flesh out the enactivist (...) approach in a way that is plausible and not merely an epiphenomenon, it is necessary to confront the problem of causal closure in a serious way. Atoms and molecules in the brain do not violate the normal causal principles that govern them in other contexts. The theory of self-organizing dynamical systems must be developed in a way that is compatible with causal closure rather than contradicting it. (shrink)

In a recent paper, Andy Clark (2008) has argued that the literature on embodied cognition reveals a tension between two prominent strands within this movement. On the one hand, there are those who endorse what Clark refers to as body-centrism, a view which emphasizes the special contribution made by the body to a creature’s mental life. Among other things, body centrism implies that significant differences in embodiment translate into significant differences in cognition and consciousness. On the other hand, there are (...) those who endorse what Clark calls extended functionalism, a view which sees the mind as the joint product of the computational resources presented by (i) intracranial processing, (ii) bodily input, and (iii) environmental scaffolding. As such, extended functionalism allows for the possibility that any contribution of the body to cognition and consciousness can be compensated for by the other two contributing factors. While Clark’s sympathies lie with the latter approach, we argue in favour of the former. In particular, we focus on consciousness and argue that the unique contribution the body makes to a creature’s manifold of phenomenal experience cannot be compensated for, in the manner, and on the scale, that Clark envisages. (shrink)

Prior to the twentieth century, theories of knowledge were inherently perceptual. Since then, developments in logic, statis- tics, and programming languages have inspired amodal theories that rest on principles fundamentally different from those underlying perception. In addition, perceptual approaches have become widely viewed as untenable because they are assumed to implement record- ing systems, not conceptual systems. A perceptual theory of knowledge is developed here in the context of current cognitive science and neuroscience. During perceptual experience, association areas in the (...) brain capture bottom-up patterns of activation in sensory-motor areas. Later, in a top-down manner, association areas partially reactivate sensory-motor areas to implement perceptual symbols. The stor- age and reactivation of perceptual symbols operates at the level of perceptual components – not at the level of holistic perceptual expe- riences. Through the use of selective attention, schematic representations of perceptual components are extracted from experience and stored in memory (e.g., individual memories of green, purr, hot). As memories of the same component become organized around a com- mon frame, they implement a simulator that produces limitless simulations of the component (e.g., simulations of purr). Not only do such simulators develop for aspects of sensory experience, they also develop for aspects of proprioception (e.g., lift, run) and introspec- tion (e.g., compare, memory, happy, hungry). Once established, these simulators implement a basic conceptual system that represents types, supports categorization, and produces categorical inferences. These simulators further support productivity, propositions, and ab- stract concepts, thereby implementing a fully functional conceptual system. Productivity results from integrating simulators combinato- rially and recursively to produce complex simulations. Propositions result from binding simulators to perceived individuals to represent type-token relations. Abstract concepts are grounded in complex simulations of combined physical and introspective events. Thus, a per- ceptual theory of knowledge can implement a fully functional conceptual system while avoiding problems associated with amodal sym- bol systems. Implications for cognition, neuroscience, evolution, development, and artificial intelligence are explored. (shrink)

Various defenses of amodal symbol systems are addressed, including amodal symbols in sensory-motor areas, the causal theory of concepts, supramodal concepts, latent semantic analysis, and abstracted amodal symbols. Various aspects of perceptual symbol systems are clarified and developed, including perception, features, simulators, category structure, frames, analogy, introspection, situated action, and development. Particular attention is given to abstract concepts, language, and computational mechanisms.

Mental imagery (varieties of which are sometimes colloquially refered to as “visualizing,” “seeing in the mind's eye,” “hearing in the head,” “imagining the feel of,” etc.) is quasi-perceptual experience; it resembles perceptual experience, but occurs in the absence of the appropriate external stimuli. It is also generally understood to bear intentionality (i.e., mental images are always images of something or other), and thereby to function as a form of mental representation. Traditionally, visual mental imagery, the most discussed variety, was thought (...) to be caused by the presence of picturelike representations (mental images) in the mind, soul, or brain, but this is no longer universally accepted. (shrink)

Viewers have a way of using their somatosensory system to create temporary boundary changes that bring them into intimate relationships with art objects. Spectators experience this imaginary fusion when simultaneously attending to their own somatosensory sensations, which occur inside the body, and to qualities of the artwork, which exist in the external world. At such moments viewers reinterpret their somatosensory sensations as a quality of the artwork. When inside and outside are reinterpreted, viewers cross the conventional boundary between self and (...) object. This effect can be illustrated in first person reports and supported by current research in the neurosciences and the humanities. (shrink)

Walt Disney’s movie, The Pagemaster (1994) begins on a dark and stormy night, with a young boy stumbling into an immense, gothic-styled library for refuge from the rain. Once inside, he is soon carried away by a tumultuous river of coloured paints, transformed into an animated characterization of himself, and thrust into an animated world of literature, where he battles Captain Hook, flees Moby Dick, and participates in other classic tales of adventure, horror, and fantasy. -/- Adults might understand the (...) film as a fanciful description of how they feel when reading a lively book. Although they would probably not imagine themselves tagging along with the animated characters like a 4th musketeer, they might very well claim that they enter a fiction through the viewpoint of one or more of the characters, experiencing, imaginatively, mental images of the sights, sounds, smells, and movements that the character would experience. Under this description, the reader would be forming multi- modal images that would correspond directly to what the literary characters are doing, thinking, and experiencing. When a fictional hero whips out his sword and slashes a rope in half, the reader might form a visual image of the hero’s determined face, an auditory image of the sound of the whizzing sword, and a motor image of an extended arm movement. I call such an imitative participation, by use of mental images in any modality, a simulation. -/- I suggest that this imitative experiencing of a fiction through the production of multi-modal imagery - a simulation - is not the only way in which readers might engage a literary text. In this paper I explore the hypothesis that readers might use their own bodily processes - those of the somato-viscero-motor system (SVM) for a non-imitative activity that I call a reinterpretation and that the reinterpretation might make a distinctive contribution to the reading process. As an example of a simulation and a reinterpretation, take the SVM experience of the reader’s breathing. A simulation would occur if the text describes a character who is taking deep breaths of air and the reader creates a mental image representing the experience of breathing. In this case, the reader’s mental image of breathing would stand for a property of the literary work - the fictional experience of breathing. -/- By contrast to the simulation, a reinterpretation would occur if the text describes a character who is gazing at long, wispy clouds that extend outward from a horizon and the reader uses his own experience of breathing to stand for the visual sense of looking at a long, continuous expanse of filmy white: the reader’s actual breathing would stand for a property of the literary work - the fictional experience of seeing. Breathing is not the same as seeing. This should help clarify the following definition. -/- I hypothesize that a reinterpretation occurs when the reader becomes aware of some component of the SVM system and reinterprets it as a property of the literary work that is not the same as that particular SVM process. The SVM experience is projected into the literary work. (shrink)