The two Soviet psychiatrists Marat Vartanyan and Andrei Mukhin in their interview to the Soviet newspaper "Komsomolskaya Pravda" issued on 15 July 1987 explained how it was possible that a person might be mentally ill, while people surrounding him did not notice it, for example, in the case of "sluggish schizophrenia". What was meant by saying that a person is mentally ill? Marat Vartanyan said, "… When a person is obsessively occupied with something. If you discuss another subject with him, he is a normal person who is healthy, and who may be your superior in intelligence, knowledge and eloquence. But as soon as you mention his favourite subject, his pathological obsessions flare up wildly." Vartanyan confirmed that hundreds of people with this diagnosis were hospitalized in the Soviet Union. According to Mukhin, it took place because "they disseminate their pathological reformist ideas among the masses." A few months later the same newspaper listed "an exceptional interest in philosophical systems, religion and art" among symptoms of sluggish schizophrenia from a "Manual on Psychiatry" of Snezhnevsky's Moscow school.