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feast or famine
Boolean queries often result in either too few (=0) or too many (1000s) results.
Query 1: “standard user dlink 650” → 200,000 hits
Query 2: “standard user dlink 650 no card found”: 0 hits
It takes a lot of skill to come up with a query that produces a manageable number of hits.
AND gives too few; OR gives too many
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