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The success with negation-based queries displayed in the example is thoroughly explained in The Structured Search Engine -- http://www.youtube.com/watch?v=5lCSD
by threepipeproblm 15y ago
The success with negation-based queries displayed in the example is thoroughly explained in The Structured Search Engine -- http://www.youtube.com/watch?v=5lCSDOuqv1A http://www.youtube.com/watch?v=5lCSDOuqv1A
TL;DR - Google has added phrase chunking, weights positive/negative words in phrases, and allows negative phrases to modify the search impact of the affected phrases.