313:: If the subject of the article is a book or film or other artistic work, it is unnecessary to cite a source in describing events or other details. It should be obvious to potential readers that the subject of the article is the source of the information. If the subject of the article is a work that has been published or broadcast in a serial manner, then citing the episode, issue or book can aid comprehension for readers not familiar with the whole of the serial work. It also aids verification if editors are concerned about inappropriate use of the artistic work (
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section of non-controversial subjects is less likely to be challenged and less likely to require a source. There is not, however, an exception to citation requirements specific to leads. Complex, current, or controversial subjects may require many citations; others, few or none. Contentious material about living persons must always be cited, regardless of the level of generality.
387:: Any editor has the right to challenge unsourced material by opening a discussion on the talk page or by tagging it. Material that should be removed without discussion includes unsourced contentious material about a living person, clear examples of original research, and anything that is ludicrous or damaging to the project.
403:: Editors who wish to respond to the challenge should do so in a timely manner. If no response is forthcoming, the challenger may tag or remove the statement in question. Unless the material falls into the class that should be removed without discussion, the challenger should await a timely response prior to removing.
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Because the lead will usually repeat information also in the body, editors should balance the desire to avoid redundant citations in the lead with the desire to aid readers in locating sources. Leads are usually written at a greater level of generality than the body, and information in the lead
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is often appropriate, especially for statements describing a person's published opinions or words. In-text attribution is not appropriate for other forms of close paraphrasing, such as if you paraphrase "The sky is usually blue" as "The sky is often the color
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The distance between material and its source is a matter of editorial judgment. The source of the material should always be clear, and editors should exercise caution when rearranging cited material to ensure that the text–source relationship isn't broken.
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when quoting published material, whether within quotation marks or not, whether using direct or indirect speech. When using footnotes, the citation should be placed in the first footnote after the quotation.
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Material that is actually challenged by another editor requires a source or it may be removed; and anything likely to incur a reasonable challenge should be sourced to avoid disputes and to aid readers (see
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