 What caused Macklin to lose his intelligence?
But Macklin is exactly what we need for a quick, dramatic test. "But now Macklin—" Elliot Macklin had inherited the reputation of the late Albert Einstein in the popular mind. "No, Harold, it isn't," Macklin admitted. "I would have said the common cold," Macklin replied, "but I suppose from what you have said you mean headaches." "There are a number of different causes for headaches—nervous strain, fatigue, physical diseases from kidney complaints to tumors, over-indulgence—but there is one effect of all of this, the one real cause of headaches," Mitchell announced. A dew of perspiration had bloomed on Macklin's forehead.
 His brain cells were not working properly
 He had suffered a stroke  His brain cells were not working properly  He was using heroin  He was only pretending