Consciousness refers to the subjective, first-person experience of the world, including thoughts, feelings, sensations, and perceptions.

Qualia are the specific, subjective qualities of conscious experience, such as the taste of coffee or the feeling of pain.

David Chalmers is known for his theory of 'qualia', where he argued that qualia are non-physical, subjective properties of consciousness.

The Hard Problem of Consciousness refers to the problem of explaining how physical processes in the brain can give rise to subjective conscious experience.

Daniel Dennett is known for his theory of 'consciousness as an illusion', where he argued that consciousness is an illusion and that all mental states can be reduced to physical processes.

Emergent Consciousness refers to the idea that consciousness is an emergent property of complex physical systems, such as the brain.

John Searle is known for his theory of 'consciousness as a fundamental property of the universe', where he argued that consciousness is a fundamental property of the universe and that it is not reducible to physical processes.

Enactive Consciousness refers to the idea that consciousness is a product of the interaction between the brain and the environment.

Daniel Dennett is known for his theory of 'consciousness as a higher-order representation', where he argued that consciousness is a higher-order representation of mental states and that it is not directly accessible to introspection.

Neural Correlates of Consciousness refers to the idea that consciousness is a product of the activity of specialized neural networks in the brain.

Daniel Dennett is known for his theory of 'consciousness as a product of evolution', where he argued that consciousness is a product of the evolution of the brain and that it serves a functional role in survival.

Extended Consciousness refers to the idea that consciousness is a product of the interaction between the brain, the body, and the environment.

Thomas Nagel is known for his theory of 'consciousness as a product of social interaction', where he argued that consciousness is a product of the interaction between the brain and the social environment.

Quantum Consciousness refers to the idea that consciousness is a product of the interaction between the brain and the quantum world.

John Searle is known for his theory of 'consciousness as a product of the electromagnetic field', where he argued that consciousness is a product of the interaction between the brain and the electromagnetic field.