Even the most primitive cybernetic agent must be able to sense its environment in order to reach its goals. More complex agents can integrate different sensations into a global awareness of their situation, and use subsequent experiences to learn and improve their mental functioning. Only people are moreover conscious of their own experiences, and thus able to control them. Such consciousness is an eminently subjective relation between the agent and the relevant internal and external aspects of its situation. It is not some mysterious kind of substance or fluid, and there is no intrinsically "hard" problem of consciousness.
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