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Over the last century, paleontologists have used small differences between fossil specimens to differences between fossil specimens to classify triceratops into sixteen species. This classification is unjustified, howver, since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time.
Which of following, if true, would enable the conclusion of the arguement to be properly drawn?
No gegraphical area ever supports more than three similar species at the same time.
谁能帮我解释一下吗?怎么推导出来的?谢谢 |
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