Cope aizivikanwa kuva anokakavara uye ane hunhu hwakasimba; Marsh aive anononoka, akachenjera, uye akavhiringidzika. Vese vaive vanokakavara uye vasina kuvimba. Kusiyana kwavo kwakawedzerawo kunzvimbo yesainzi, sezvo Cope aive mutsigiri akasimba weNeo-Lamarckism apo Marsh akatsigira dzidziso yaCharles Darwin yekushanduka-shanduka kuburikidza nesarudzo yemusikirwo. Kunyangwe panguva dzakanakisa dzezvinhu, varume vaviri ava vaiwanzo tarisa pasi kune mumwe nemumwe. Sezvakataurwa nemumwe muongorori, "The patrician Marshall angave asina kuzviona semurume. The academician Edward Othniel Cope akazviona semurume ane hunhu, nekuda kwehunhu hwavo hwakasimba.
vanononoka, vane nhevedzano zvikuru, uye vanozvipinza mukati