Either by one's sharing in the other, as 'pale man' is different from 'pale' and 'man' (for it shares in these), or when one is a differentia of the other, as 'man' is different from 'animal' and 'two-footed'.
Edo batak bestean parte hartuko du, "gizaki zuria" "gizakiaz" eta "zuriaz" aparteko zerbait den bezala (haietan parte hartzen baitu), edo, bestela, bata bestearen desberdintasun bat izaten denean bezala, "gizakia" "animaliaz" eta "hankabidunez" aparteko zerbait den bezala.