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in a source, is original research regardless of the type of source. Claims based on statements and sections from reliable sources directly dealing with the central topic of the work are preferred. It is good to report information from sections that present an extended argument with a conclusion strongly consistent with the argument. It is important that reliable references are cited
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in the references cited. Claims should not rely on unclear, incongruent or passing comments, even if the source is generally reliable. Claims left open to interpretation should be precisely cited or avoided. Drawing conclusions not stated in the reference, or extrapolating a position from the claims
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Research that consists of collecting and organizing material from existing sources within the provisions of the content policies is, of course, encouraged: this is "source-based research," and it is fundamental to writing an encyclopedia. However, consideration should be given to the kind of source
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Some of these sources may be particularly reliable and helpful in presenting a complete encyclopedic article, such as census data. Some auxiliary references may also be useful for providing supporting facts, figures or limited quotations to accompany claims and analysis from reliable third-party
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as used in reliable third-party sources. References from questionable, historical and "raw" sources are examples of auxiliary sources. References from the subject, or those close to the subject, are also examples of auxiliary sources. A third-party source from one article may be treated as an
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Various professional fields treat the types of sources in differing fashions, but such distinctions are not our concern here. The main focus here is distinguishing between which references articles should principally rely on, and which references have a tendency to be
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Review articles and references providing a broad treatment, such as university-level textbooks, are particularly useful in summarizing large bodies of literature and research. Since
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released by a publisher with a reputation for fact-checking and accuracy. Third-party publications are preferable because they generally provide analysis, offer a more independent view and provide a broader context for the subject. Care should be taken to avoid
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In that instance, an editor would be relying on a reliable third-party reference to present, analyze and/or interpret an auxiliary source. The third-party publication helps avoid original research, recognize due weight and identify
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be supported by a reliable source. "Original research" is a claim, including interpretation or analysis of facts and references, for which no reliable source can be found. Producing a reliable published source that advances the
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Also, there is a broad consensus for widespread use of some auxiliary sources, such as using census data in articles on populated places and citing interviews as direct sources of a subject's self-identification, opinions and
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Examples of such references would be recent post-secondary textbooks, or a contemporary work released by a reputable publisher. Peer-reviewed articles in reputable journals are also considered reliable third-party
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generally accepted knowledge about a given topic. Sources can be divided into two broad categories for these purposes, based upon their quality and reliability: reliable third-party sources and auxiliary sources.
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publications. However, serious care should be taken to avoid presenting a claim or interpretation, explicit or implied, differing from the reliable references cited. Self-published and dubious sources are
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138:"Verifiability" requires that the facts and claims we present are verifiable by other editors. Any material that is challenged or likely to be challenged
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make no analytic, synthetic, interpretive, explanatory, or evaluative claims. Contributors drawing on auxiliary sources should be careful to comply with
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only report what the source states, the accuracy of which is easily verifiable by any reasonable, educated person without specialist knowledge, and
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While articles should principally rely on reputable third-party sources, care should still be taken that the claims reported in the article are
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reliable published sources is essential in our goal of building a quality reference work.
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conditions. Of course, auxiliary sources may be used freely
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