“The key utility measure is user happiness. Speed of response and the size of the index are factors in user happiness. It seems reasonable to assume that relevance of results is the most important factor: blindingly fast, useless answers do… — Christopher D. Manning Copy Share Image
“Thus, an index built for vector space retrieval cannot, in general, be used for phrase queries. Moreover, there is no way of demanding a vector space score for a phrase query—we only know the relative weights of each term in… — Prabhakar Raghavan Copy Share Image
