According to HOT, consciousness is not a basic or primitive phenomenon, but rather a higher-order cognitive process that involves the ability to reflect on and represent one's own mental states.

David Chalmers is a contemporary philosopher who is widely regarded as the leading proponent of the Higher-Order Thought Theory.

According to HOT, consciousness is a higher-order cognitive process that involves the ability to reflect on and represent one's own mental states. Therefore, the ability to reflect on and represent one's own mental states is a necessary condition for consciousness.

The Higher-Order Thought Theory is inconsistent with the physicalist view of the mind because it posits a non-physical entity (consciousness) that is somehow able to interact with the physical brain.

According to HOT, qualia are not basic or primitive phenomena, but rather higher-order representations of one's own mental states. This means that qualia are not directly accessible to introspection, but rather are inferred from one's own higher-order thoughts and beliefs about one's own mental states.

According to HOT, consciousness is a higher-order cognitive process that involves the ability to reflect on and represent one's own mental states. Self-awareness is a specific type of consciousness that involves the ability to reflect on and represent one's own self as an object of thought. Therefore, consciousness is a necessary condition for self-awareness.

According to HOT, consciousness is a higher-order cognitive process that involves the ability to reflect on and represent one's own mental states. This means that consciousness is both a subjective phenomenon (in the sense that it is experienced from a first-person perspective) and an objective phenomenon (in the sense that it can be studied scientifically from a third-person perspective).

The Higher-Order Thought Theory is compatible with some other theories of consciousness, such as the Representational Theory of Consciousness and the Global Workspace Theory. However, it is incompatible with other theories of consciousness, such as the Materialist Theory of Consciousness and the Phenomenal Consciousness Theory.

The Higher-Order Thought Theory faces a number of challenges, including its vagueness and ill-defined nature, its complexity and difficulty of understanding, and the lack of empirical evidence to support it.

The Higher-Order Thought Theory is still a popular and influential theory of consciousness because it is the only theory that can account for the subjective nature of consciousness. Other theories of consciousness, such as the Materialist Theory of Consciousness and the Phenomenal Consciousness Theory, cannot explain why consciousness is experienced from a first-person perspective.