false drop

From rod- (needle-) based retrieval in edge-punched card-based data systems.[1]

false drop (plural false drops)

1. A non-targeted card that falls out from a card data deck, when a rod search is performed.
2. Targets, hits, that are not relevant in an information retrieval search.
3. Retrieved, but unwanted, document representations.
4. noise in an information retrieval search.
   • 1992, Carolyn Watters, Dictionary of Information Science and Technology, Boston: Academic Press:

     False drop (a): a false drop is a retrieved item that meets the syntactic requirements of a query but not the semantic requirements of a query […]

• false hit
• false retrieval

• drop-leafs, dropleafs