Booleans and databases: The AND operator has become redundant

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Most academic databases, catalogues and search engines offer Boolean search, i.e. AND, OR, NOT.  However  I have found that the Boolean operator AND has become mostly redundant as most databases automatically put AND between search terms in the same search field.  Google Search and Scholar have always done this.  Other resources that also do it include Summon Discovery Service, Web of Science, Scopus, Te Puna Search, WorldCat, Index New Zealand, and NZResearch.org

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