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1. A 42 year old man returns to his physician for the fourth time in 5 months with the same complaints of intermittent numbness of his fingers & indigestion. Although his medical workup has been unremarkable, this has failed to reassure him. He remains anxious and is now concerned that he has coeliac disease and requests endoscopy. What is the most likely diagnosis of this man?
Яку логічну функцію реалізує логічний елемент «НІ»?