Not only do we not agree on how to measure or recognize consciousness in others, but we are also unable to even “prove” it exists in ourselves. Science often dismisses our individual experiences—what it feels like to smell an orange, or to be in love—as qualia. We are left with theories and metaphors for consciousness: A stream of experience. A self-referential loop. Something out of nothing. None of these are satisfactory. Definition eludes us.
