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R. M. Hare also criticised ethical naturalism because of its fallacious definition of the terms ' good ' or ' right ' explaining how value-terms being part of our prescriptive moral language are not reducible to descriptive terms : " Value-terms have a special function in language , that of commending ; and so they plainly cannot be defined in terms of other words which themselves do not perform this function " .
 R. M. Hare
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 R. M. Hare