I’m not very familiar with how Wikipedia vets the sources in the references/external links. I was wondering whether there are manual or automated checks for cyclic sources, for example a Wikipedia page cites a source for something, but such source after a few rounds of citing would go back to the same Wikipedia page.
- Does that happen with Wikipedia?
- Does it matter? I presume that would invalidate the source?
- How do they make sure it does not happen? Is there an automated check or something?
From my experience, despite all the citogenesis described in other comments here, Wikipedia citations are still better vetted than in many, many scientific papers, let alone regular journalism :/ I recall spending days following citation links in already well-cited papers to basically debunk basic statements in the field.
Can you give an example if you remember for the last point you made?
I do not have notes from that time anymore, sorry. I do recall though that after following a chain of citations I ended up at the paper in the center of this controversy. Nobody sane would cite in now except to point out its flaws, but if there’s a modern paper that cites a 10 year old paper that cites a 30 year old paper that cites it—people usually won’t notice.