ABSTRACT
ThesesIand;giverisetoaseriousdifficultyassoonasan exampleistaken:apieceofgoldcontainsportionsofcopper, blood,water,etc.amongitsingredients,butisitselfgoldrather thane.g.copperbecausegoldistheingredientwhichpredominatesinit.Considernowthegoldwhichpredominatesasan ingredient:doesitalso,liketheoriginalpieceofgold,contain withinitanadmixtureofallothersubstances?Ifso,itisgold becausegoldpredominatesinitasaningredient;andwecanask thesamequestionabouttheingredientoftheingredient,andso onadinftnitu?Jt.Butthiswillnotdo,4foritwillbeimpossibleto saywhatisphysicallydistinctiveaboutgoldasopposedtoany othersubstance.Itwillbepossibletosayonlythatgoldisthe substancewhosepredominantingredientisthesubstancewhose predominantingredientisthesubstancewhosepredominantingredientis...;andtheanswertothesamequestionaboutany othersubstancewhateverwillbeidentical.
