Formostofmylife,Ididn'tknowwhatanaardvarkis.AsfarasIcouldtell,aardvarks couldhavebeentropicalbirds,or'aardvark'couldhavebeenaNorwegianwordfor nightmare.Ifoundoutabouttheexistenceofthewordbyreadingphilosophicalarticles onconcepts,andlearntthattheaardvarkisakindofAfricanmammal,similartothe anteater,bybrowsingtheInternetforinformationaboutaardvarks.Thisistheshort andunremarkablestoryofhowIlearnttheconceptaardvark.Itisveryclearthat itisn'tthefullpsychologicalstoryofhowIlearncertainconcepts,andmuchlessis itaphilosophicalstoryofhownewconceptsarelearnt.BeforeIcanbegintoengage suchcompleteaccountsofthispartofhumancognition,Iwanttoshowwhatkindsof storiesonehastotelltogiveafullphilosophicalorpsychologicalaccountofconcept learning.