Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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10.2 ratings and reviews by guests and hosts must be fair , truthful and factual and may not contain any offensive or defamatory language . 

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. OPTIONS: ["Unilateral termination", "Choice of law", "Content removal", "Unilateral change", "None", "Contract by using", "Arbitration", "Jurisdiction", "Limitation of liability"].