Patients missing large parts of their brain tissue can lead normal lives because the material, the tissue, is not all there is to us.
Darwin taught that life is the product of blind, meaningless, purposeless churning — making all life, including human, hardly more special or dignified than cosmic refuse.
Any system of justice that would not meaningfully distinguish between man and beast is not worthy of the name.
Neuroscientist Patricia Churchland cites Prairie Voles to illustrate how chemical processes inform morality. Prairie Voles with a greater number of oxytocin receptors were monogamous while those with fewer such receptors were not.
In the context of ID-suppression cases, this one could be big.