Nganutin pamargin Parsimony (utawi tiuk cukur Occam), entikan sané kasenengin inggih punika entikan sané pauwahan evolusioner paling kidik sané kaperluang mangda prasida narka indik makasami sifat ring makasami anggota kelompok.
Based on the principle of Parsimony (or Occam's razor), the tree that is favored is the one with the fewest evolutionary changes needed to be assumed over all traits in all groups.