Abstract
Diagnosis helps the patient. In this paper, we show that diagnosis have the potential to protect abilities, efforts, and personalities. In one particular case introduced in this study, a mother who was anxious about the son of a high school student who visited a psychiatry who was hiding in the parents talks. In the case, the diagnosis is used successfully as a amulet. The purpose of this study is to examine how the diagnosis works for the case. It is important to focus on the use of the function of the word diagnosis based on pragmatism.