People aren't just consciousness, they're conscious of things. Of course a deaf or blind person is conscious, even if they've been deaf or blind since birth. But they aren't conscious of hearing or seeing things, and if you ask them they'll tell you that.
I'm not conscious of magnetic fields, or ultraviolet light, but other animals are, and no amount of study will overcome that deficit.
I'm not conscious of magnetic fields, or ultraviolet light, but other animals are, and no amount of study will overcome that deficit.