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  1. Information Retrieval

    Linked via "Boolean Model"

    The Boolean Model
    The Boolean Model relies on classical set theory. Documents are represented as sets of index terms, and queries are formulated using Boolean operators ($\text{AND}, \text{OR}, \text{NOT}$). Retrieval is binary: a document either matches the query criteria precisely or it does not. While simple, this model suffers from the "trolley problem" of relevance: a single missing index term can exclude an otherwise perfectly relevant document, leading …