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Shortcut: WP:1.5

1.5 sources is an utterly unofficial but fairly useful working term coined by User:Masem. It relates to the usage of sources, mostly in fiction-related articles, which cannot strictly be categorised as being either primary sources or secondary sources: interviews with key people, DVD commentary, etcpp.

In discussions surrounding fiction-related topics, it's often a matter of personal preference whether one sees such a source as a lesser, primary source which cannot provide any significant external context or whether one sees it as more of an independent, secondary source which can and should be used to add context and perspective.

For such situations, 1.5 sources can serve as a neutral working term to start negotations from the middle-gound, common-sense vantage point that such source-related issues have to be decided on a case by case basis, and that it's mostly about the specific implementation of a source rather than any categorical judgements.

[edit] See also

• Wikipedia:No original research#Primary, secondary, and tertiary sources (WP:PSTS)
• Wikipedia:Reliable sources (WP:RS)

• Wikipedia:Notability (WP:N)
• Wikipedia:Manual of Style (writing about fiction) (WP:WAF)