It matters because we consider them reliable sources: https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Perennial_sources https://en.wikipedia.org/wiki/W

It matters because we consider them reliable sources: https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Perennial_sources https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Per... Wikipedia is the most reliable source of news/perspective on issued but it can get contaminated if entities given the "reliable sources" label republish unreliable or biased dreck.