perplexity.ai

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a AI & ML ›Search Engines · Tool· 7 days ago

Perplexity AI is an AI-powered search engine that provides direct answers to queries with cited sources. It functions as a conversational research tool to help users find accurate information quickly.

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perplexity.ai

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About Perplexity

In information theory, perplexity is a measure of uncertainty for a discrete probability distribution. The perplexity of a fair coin toss is 2, and that of a fair die roll is 6; and generally, for a probability distribution with exactly N outcomes each having a probability of exactly 1 / N, the perplexity is simply N.