?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Uncomplemented+Categories%2C+or%2C+What+Is+It+Like+To+Be+a+Bachelor&rft.creator=Harnad%2C+Stevan&rft.subject=Cognitive+Psychology&rft.description=To+learn+and+to+use+a+category+one+must+be+able+to+sample+both+what+is+in+it+and+what+is+not+in+it+(i.e.%2C+what+is+in+its+complement)%2C+in+order+to+pick+out+which+invariant+features+distinguish+members+from+nonmembers.+Categories+without+complements+may+be+responsible+for+certain+conceptual+and+philosophical+problems.+Examples+are+experiential+categories+such+as+what+it+feels+like+to+%22be+awake%2C%22+%22be+alive%2C%22+be+aware%2C%22+and+%22be.%22+Providing+a+complement+by+analogy+or+extrapolation+is+a+solution+in+some+cases+(such+as+what+it+feels+like+to+be+a+bachelor)%2C+but+only+because+the+complement+can+in+princible+be+sampled+in+the+future%2C+and+because+the+analogy+could+in+principle+be+correct.+Where+the+complement+is+empty+in+principle%2C+the+%22category%22+is+intrinsically+problematic.+Other+examples+may+include+self-denial+paradoxes+(such+as+%22this+sentence+is+false%22)+and+problems+with+the+predicate+%22exists.%22+&rft.date=1987&rft.type=Conference+Paper&rft.type=NonPeerReviewed&rft.format=text%2Fhtml&rft.identifier=http%3A%2F%2Fcogprints.org%2F2134%2F1%2Fharnad87.uncomp.htm&rft.identifier=++Harnad%2C+Stevan++(1987)+Uncomplemented+Categories%2C+or%2C+What+Is+It+Like+To+Be+a+Bachelor.++%5BConference+Paper%5D++++(Unpublished)++&rft.relation=http%3A%2F%2Fcogprints.org%2F2134%2F