::There is no correct way of defining a money because it's never been used to describe a coherent taxonomic category.  Why is limiting the term to just new-world monkeys and old world monkeys a superior way to apply this word since these monkeys have nothing in common that they don't share with non-human apes. Expanding the term to include all non-human higher primates (as is done in common useage) is far more logical because all non-human higher primates have traits in common that clearly distinguish them from human primates: Fur, quadrupedalism, inability to speak.