Falconer, namely, that the period during which each species underwent modification, though long as measured by years, was probably short in comparison with that during which it remained without undergoing any change.
Kontsidero garrantzitsuagoa eta emaitza berera garamatzana da, Falconer doktoreak oraintsu azpimarratu duen moduan, honako hau, alegia, espezie batek eraldaketak izan zituen aldia, nahiz eta urtez neurturik luzea izan, ziurrenik laburra izan zela, inolako aldaketarik izan gabe egon zen aldiarekin konparaturik.