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a is the number of retrieved, relevant documents, c is the number of non-retrieved, relevant documents (sometimes termed "silence"). Recall is thus an expression of how exhaustive a search for documents is. Precision = a : (a + b), where a is the number of retrieved, relevant documents,
Relevant is something directly related, connected or pertinent to a topic; it may also mean something that is current. Relevant may also refer to: Relevant operator, a concept in physics, see renormalization group; Relevant, Ain, a commune of the Ain département in France; Relevant Magazine, a bimonthly Christian magazine
Relevance, in the common law of evidence, is the tendency of a given item of evidence to prove or disprove one of the legal elements of the case, or to have probative value to make one of the elements of the case likelier or not.
For example, in written text each symbol or letter conveys information relevant to the word it is part of, each word conveys information relevant to the phrase it is part of, each phrase conveys information relevant to the sentence it is part of, and so on until at the final step information is interpreted and becomes knowledge in a given domain.
A definition states the meaning of a word using other words. This is sometimes challenging. Common dictionaries contain lexical descriptive definitions, but there are various types of definition – all with different purposes and focuses. A definition is a statement of the meaning of a term (a word, phrase, or other set of symbols).
The word fact derives from the Latin factum. It was first used in English with the same meaning: "a thing done or performed" – a meaning now obsolete. [3] The common usage of "something that has really occurred or is the case" dates from the mid-16th century. [3]
In his book, When Words Lose Their Meaning, he argues that words of persuasion and identification define community and civic life. He states that words produce "the methods by which culture is maintained, criticized, and transformed". [15] Rhetoric remains relevant as a civic art.
Semantics studies meaning in language, which is limited to the meaning of linguistic expressions. It concerns how signs are interpreted and what information they contain. An example is the meaning of words provided in dictionary definitions by giving synonymous expressions or paraphrases, like defining the meaning of the term ram as adult male sheep. [22]