Made up in such a way as this, of course the social diagnosis will have many items, and like medical diagnosis it will be subject to frequent revisions. The doctor who never changes his diagnosis is the doctor who never makes one, or who makes it so elastic that it means nothing. So social workers should never fear to add to, to subtract from or to modify their social diagnoses. The best medical diagnoses--those made after death--often contain fifteen or twenty items. Before death in a recent case we found pneumonia. After death we found in addition: meningitis, heart-valve disease, kidney trouble, gall-stones, healed tuberculosis, and ten minor troubles in various parts of the body. So a good social diagnosis will name many misfortunes of mind, body, and estate, healed wounds of the spirit that have left their scar, ossifications, degenerations, contagious crazes which the person has caught, deformities which he has acquired. FOOTNOTE: [2] Bosanquet, Helen. _The Standard of Life and Other Studies._ (London, Macmillan & Co., 1898.) _The Family._ (London, Macmillan & Co., 1906.) CHAPTER VI THE SOCIAL WORKERS' INVESTIGATION OF FATIGUE, REST, AND INDUSTRIAL DISEASE _Fatigue and rest_ Fatigue is more important for medical-social workers to understand than any single matter in physiology or any aspect of the interworkings of the human body and soul, because it comes into almost every case from two sides: (_a_) from the workers' side because the quality of work that she puts into trying to help somebody else depends on how thoroughly she is rested, and how much she has to give; and (_b_) from the side of the patient, his physical, economic, and moral troubles, because fatigue is often at or near the root, of all these troubles. It is unfortunate that in spite of its importance, we do not know much about fatigue from the physiological point of view. Since the war of 1914-1918 we have prospects of knowing more about it than ever before; for one of the grains of good saved out of the war's enormous evils has been the fruitful studies of fatigue made in England, studies more valuable than any that I know of.