I do not believe that it could never be justifiable to experiment on a brain-damaged human.
Peter SingerThe Pentagon said that these prisoners were kept in accordance with the Geneva Convention, and of course I was not reassured by that, but I couldn't prove that that was wrong; so we're clearer about that.
Peter SingerTo give preference to the life of a being simply because that being is a member of our species would put us in the same position as racists who give preference to those who are members of their race.
Peter SingerIt would be nonsense to say that it was not in the interests of a stone to be kicked along the road...A stone has no interests because it cannot suffer. The capacity for suffering and enjoyment is, however, not only necessary, but also sufficient for us to say that a being has interests - at an absolute minimum, an interest in not suffering. A mouse, for example, does have an interest in not being kicked along the road because it will suffer if it is.
Peter SingerIf we compare a severely defective human infant with a nonhuman animal, a dog or a pig, for example, we will often find the nonhuman to have superior capacities, both actual and potential, for rationality, self-consciousness, communication and anything else that can plausibly be considered morally significant.
Peter Singer