  The discussion has gone full circle. The multiple-realizability argument being criticized by Sober was based on abstract considerations in the context of philosophy of mind. Philosophers of biology drew on this literature to construct the gory details objection against the idea that molecular genetics is reducing classical genetics. Other philosophers argued that this objection did not stand up to a careful analysis of the concrete situation in genetics. Sober has developed lessons from the discussion about genetics to critique the original anti-realizability argument and draw general conclusions about reductionism. 