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In their book , Friedman and Malone propose that civil defendants defeat meritorious lawsuits by three main techniques -- " complexity , confusion and ambiguity " - and that plaintiff advocates can prepare more persuasive cases by developing case-specific “ rules ” that clarify the core liability issues in the case .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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