CONCEPT
Problem of Other Minds
The epistemological problem that one can never be certain another being is conscious—only one's own experience is directly known—intensified by AI to the question of whether consciousness exists at all in the other.
The classical philosophical problem that, while I know with certainty that I am conscious through direct first-person access, I can never possess equivalent certainty about another being's
consciousness, because I have no direct access to another's subjective experience. All I can observe are behaviors, utterances, and physiological states—third-person evidence that is consistent with consciousness but does not logically entail it. With other humans, the inference from behavioral similarity to experiential similarity is so strong that skepticism about other human
minds is regarded as pathological rather than philosophical. With non-human animals, the inference weakens as behavioral and anatomical similarity decreases—we are more confident that chimpanzees are conscious than that insects are, not because of any direct evidence but because of evolutionary proximity and behavioral complexity. With artificial intelligence,
Nagel's framework reveals that the problem reaches a new extreme: not merely uncertainty about what the other experiences (the bat problem) but uncertainty about whether the other experiences anything at all. The behavioral