However this is incorrect. There is a difference between simply being alive and living, and those with terminal illnesses are no longer able to live the life they once had. Many are constantly in and out of the hospital or take medications that alter their ability to maintain the life they previously led, which can reduce their quality of life to such an extent that they feel as if they are no longer living, but simply alive. When they get to that point, they may feel as if continuing to be alive is just a burden, not only to themselves, but to those around them (Brock 614). Since life at this point is seen as a burden, it would be morally permissible for a doctor to help end the patient's life if he asked. The patient is no longer interested in keeping him alive and there probably wouldn't be much anyone else could say to change his mind. Philosopher Daniel Callahan is against euthanasia as a means of ending the suffering or burden one feels has become of one's life, comparing medically assisted euthanasia to dueling or selling oneself into slavery. He feels that, like dueling or selling into slavery, euthanasia does not ennoble humanity (Callahan 626). Callahan's argument can, however, be debunked through the autonomy argument, because the simple fact of being able to choose to undergo euthanasia and have one's wishes respected is dignified.