some useful principles for designing a social search engine. In a library, people use keywords to search, the knowledge base is created by a small number of content publishers before the questions are asked, and trust is based on authority. In a village, by contrast, people use natural language to ask questions, answers are generated in real-time by anyone in the community, and trust is based on intimacy. These properties have cascading effects — for example, real-time responses from socially…
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