draw the line at the point where an individual has no hope of being a productive and valuable member of society. Draw the line at the point in which an individual does not have the capacity to understand their own miserable lot in life. the blind, the deaf and dwarves can all live productive and worthwhile lives. Perhaps you are unclear on this, but it would be impossible to abort an elderly person or the sick. All of the groups you listed have the capacity to determine their own fate. If they choose to die that is a choice which they can make themselves. Children with downs are being brought into the world because some selfish couple is so hellbent on having a family that they would condemn their own child to a lifetime of mockery, institutionalization, and self-ignorance. An abortion in the case of downs is an act of mercy, not of cruelty.