The authors are surely right that we are working on a too low level, and vulgar behaviourism has been slowly going out of fashion anyway. However, they haven't

The authors are surely right that we are working on a too low level, and vulgar behaviourism has been slowly going out of fashion anyway. However, they haven't yet convinced their approach is useful. I note that their approach can't (yet?) begin to answer their own worm question (which head will the worm have?) either, and their analogies to software and hardware seem simplistic. As an article this is worthwhile, and their proposal may well turn out to be a useful research direction, but it's not there yet. Hopefully there'll be a part 2. P.S. There's no need to convince us that multicell organisms are compatible with PD as the article tries to do - so what if they weren't?