Following up on the recent discussion about citation and sources, I'd like to make a few points in no particular order.
1. Some primary sources are too difficult for most editors to access. Examples include unpublished material in archives and old newspapers in foreign languages. Other material is readily available - for example almost every university with a Law School or Political Science department will have the UN official records that I located recently.
2. Primary sources are not necessarily better than secondary sources. Many types of primary sources require experience and knowledge to interpret because they are written for people in the know and not for outsiders. In this case a presentation and analysis of the material by a specialist who understands the context and knows about other relevant sources is to be preferred. (Conversely, presentation of genuine primary material in a misleading fashion is taught in Propaganda 101.)
3. Many secondary sources are written by people whose purpose is to deceive their readers. We Wikipedians did not invent the art of POV-pushing. For every topic which provokes edit-wars in Wikipedia, there is an active information-war out there trying to convince us of one or the other POV.
4. The combination of 2 and 3 is a catch-22. We need the specialists but can we trust them? There is no easy answer to this but some partial answers can be given. One is that people who work for advocacy groups or governments are the least trustable. Next least trustable are the "independent experts" the media like to consult. The most trustable are academics; not the teachers you may have taken a course from, but those who publish their research in peer-reviewed journals and get cited by other such people. However, this only goes for academics writing on their own specialties.
5. Academic specialists have prejudices and political opinions too and there is no such thing as an unbiased secondary source.
6. The first rule of citation is to state the actual place you got the information from. If you want to report on some document D you read about in book B, your first obligation is to name B. It is a sin to only name D unless you looked at D yourself.
7. If it is necessary to cite one of the less trustable sources (see 4), the source should be identified sufficiently to warn readers that the source may have a motivation in slanting the evidence. That is, say what organisation the source belongs to or what job they have which might influence their opinion. However, it is not necessary to pass judgment on the source (say "member of the XYZ political party", not "member of the XYZ political party which some people claim to be a lot of racist scum").
8. Random web pages which make unsourced claims are not sources at all in my opinion and should be avoided altogether.
Zero.
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