The target article's emphasis on distinguishing sign from gesture may resolve one important objection to gesture-first theories of language evolution. However, this approach risks undervaluing the gradual progression from nonlanguage to language over hominin evolution, and in emerging sign systems today. I call for less emphasis on drawing boundaries and more emphasis on understanding the processes of change.

中文翻译：

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模糊手势语言线的利弊：进化语言学的观点

目标文章对区分手势和手势的强调可能会解决对语言进化中手势优先理论的一个重要反对意见。然而，这种方法可能低估了从非语言到语言的逐渐发展，而不是人类进化以及当今新兴的符号系统。我呼吁减少对划定界限的强调，而更多地强调理解变革的过程。