结果众说纷纭：有人认为他们不如现代人聪明，也有人认为他们的语言技能不如现代人完善[译注1]或是工具不如现代人先进，甚至有人认为是因为他们不会跨地区贸易[译注2]。

• The extinction of Neanderthal man has been attributed variously to his having lower intelligence than modern humans, to worse language skills, to cruder tools, or even to the lack of a propensity for long-distance trade.