Consciousness

Consciousness — the subjective, felt character of experience — is one of the most fascinating and difficult problems in philosophy and science. What is it for there to be "something it is like" to be you? How does awareness arise from matter?

The Hard Problem

Philosopher David Chalmers coined the term "the hard problem of consciousness" (1995):

The easy problems — explaining attention, memory, perception, behavioral control — are hard scientifically, but in principle explainable by cognitive science and neuroscience
The hard problem — why is there subjective experience at all? Why don't we process information "in the dark," without any inner felt quality?

Even a complete physical account of the brain would not obviously explain why firing neurons feel like anything. This explanatory gap motivates non-physicalist views.

Qualia

Qualia are the subjective, intrinsic qualities of experience:

The redness of red as you experience it
The painfulness of pain
The taste of coffee

Frank Jackson's Mary's Room thought experiment: Mary is a brilliant neuroscientist who has lived her whole life in a black-and-white room, reading everything about color vision. When she leaves and sees red for the first time, does she learn something new? If yes — she already knew all the physical facts — it seems there are non-physical facts about experience.

Major Positions

Physicalism / Materialism

Mental states are physical states. Consciousness is identical to (or realized by, or supervenes on) brain processes.

Identity theory — mental states are identical to brain states
Functionalism — mental states are defined by causal roles; they can be realized in different physical substrates ("multiple realizability")
Eliminative materialism — folk psychology (beliefs, desires) will be eliminated by a mature neuroscience

Dualism

Mental and physical are fundamentally distinct:

Substance dualism (Descartes) — mind (res cogitans) and body (res extensa) are distinct substances. See Descartes.
Property dualism — one substance, but mental and physical are irreducibly distinct properties. Chalmers' position.
Epiphenomenalism — mental events are caused by physical events but have no causal power themselves

Panpsychism

Consciousness (or proto-conscious properties) is fundamental and universal — present to some degree in all matter. Not the folk view that rocks are conscious, but that consciousness is not reducible to something else. Gaining serious defenders in contemporary philosophy (Galen Strawson, Chalmers).

Illusionism

Consciousness as ordinarily conceived is an illusion — we are systematically wrong about the intrinsic qualities of experience. Dan Dennett's position: there is no "Cartesian theater" of inner experience; introspection is unreliable.

Historical Approaches

Descartes

Descartes' substance dualism placed the conscious mind outside the physical world. The mind-body problem he created — how do non-physical mind and physical body interact? — remains central to the field. See Descartes.

Hume

Hume's bundle theory: the self is not a unified, persisting entity but a bundle of perceptions. There is no "inner self" that has experiences — only the experiences themselves in succession. See Hume.

Hegel

For Hegel, consciousness is not a private inner world but a dynamic, socially embedded self that develops through Dialectics — particularly through the Master-Slave dialectic in the Phenomenology of Spirit.

Phenomenology

Phenomenology (Husserl, Heidegger, Merleau-Ponty) investigates the structure of conscious experience from the first-person perspective — the intentional directedness of consciousness, the role of the body, the constitution of time and space. See Phenomenology.

Wittgenstein

Wittgenstein's private language argument challenges the idea that we have privileged, infallible access to our own mental states. Mental concepts get their meaning from public criteria, not private ostension.

Animal Consciousness

Do animals have phenomenal consciousness? The Cambridge Declaration on Consciousness (2012) affirmed that many non-human animals possess the neurological substrates for consciousness. This has direct implications for Ethics and animal welfare.

Consciousness and Free Will

If consciousness is entirely determined by neural processes, does this undermine Free Will? See Free Will for the philosophical debate. Libet's experiments (showing neural activity precedes conscious decision) have been widely (perhaps too widely) invoked in this debate.

Descartes — the origin of the modern mind-body problem
Hume — bundle theory of the self
Hegel — consciousness as dialectical self-development
Phenomenology — first-person investigation of experience
Wittgenstein — private language and the limits of introspection
Existentialism — consciousness as radical freedom and self-creation
Free Will — neural determinism and the feeling of agency
Metaphysics — what kind of thing is the mind?
Epistemology — is introspection a reliable source of knowledge?