1993) Another issue raised is how we can know whether the person who wishes to die is actually making a rational decision and whether he or she fully understands what it is about they want. Who's to say they have sound mental capacity or aren't simply pandering to peer pressure? Or what if a doctor misidentified a patient who is not terminally ill or if their illness could be cured but they wanted to be killed? A person may have recovered to live and be healthy again despite short-term suffering. He says to this: “A longer life is not a good so supreme that it outweighs all other considerations” (Singer, Peter. 1993), which otherwise means they would no longer suffer unbearable pain, even if it were for a short time. The refutation of other Singer philosophers to these points is insufficient, however. The weakest argument in his essay is the way he concludes it by saying “…combination between respect for the preferences, or autonomy, of those who decide for euthanasia and the clear rational basis of the decision itself” (Singer, Peter 1993).