Hypothetical dividing line between the smallest known brain size of AMHs (about 885 cm3) and the largest known brain size of a great ape (about 650 cm3). A. Keith set the Rubicon at 750 cm3, F. Weidenreich at 700 cm3, and H. Vallois at 800 cm3. AkamentalRubicon.
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Rubicon (Irrevocable commitment, threshold; see cerebral Rubicon.)
Keith, Arthur (British anatomist and teacher, conservator at the Hunterian Museum. Remembered for his errors ...)