A NorthPeak technician may ask for fault code E40, or say that a machine gets hot when it is warm outside. Keyword search finds the exact code and misses the paraphrase. Vector search finds the meaning and can miss a rare code. On the 31 chunks of the manuals, the two searches agree on the top chunk for four questions out of five. This lesson compares them and shows how hybrid search merges both rankings with reciprocal rank fusion.
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