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His later defence against his confession was based on partial insanity , alleging that he had been troubled with Korsakoff 's syndrome ( as a result of rabies inoculation ) and so his confession was not reliable .
 Korsakoff 's syndrome
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Text: {0} 
Answer:
 Korsakoff 's syndrome