[Aubrey Nunes]

I recently gave a paper at the Changing Foundaries conference, updating my 2022 paper in significant ways. The evolution of speech and language is crucially relevant to its acquisition and to what speech and language therapy can do when the acquisition process goes wrong. I now propose seven key steps in the evolution of human speech and language, rather than five. By the most recent estimate from a paper last month, the probable date for the completion of this evolution now appears to be around 135,000 years ago, rather than 150,000 years ago, as by the 2022 Biolinguistics conference, which was more by well informed guess-work rather than by serious calculation.

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