I seek a way of answering such questions based on physical principles, on looking at the actual wiring diagram of a brain and deducing from its circuits the sensations that the brain is capable of experiencing. Not just the existence of conscious states, but their detailed character as well. Perhaps you think this feat is beyond science? Don’t. Poets, songwriters, and security officials bemoan the impossibility of knowing the mind of anybody else. Although that may be true when looking from the outside, it is not true if I have access to a person’s entire brain, with all of its elements. With
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