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Greek philosophers , such as Socrates , Plato , and Aristotle , understood that the soul ( ψυχή " psūchê " ) must have a logical faculty , the exercise of which was the most divine of human actions .
 Socrates, Plato, Aristotle
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Socrates, Plato, Aristotle