What's in a generation or two?
In a recent post ("Creole birdsong?", 5/9/2008), I mentioned Derek Bickerton's "language bioprogram hypothesis". Derek responded with a long comment. Since I responded to his comment with another post ("A multi-generational bioprogram? Derek Bickerton objects", 5/10/2008), I invited him to respond in kind. The guest post below is the result.
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