https://en.wikipedia.org/wiki/Wikipedia:Use_of_primary_sources_in_Wikipedia https://en.wikipedia.org/wiki/Wikipedia:Use_of_primary_sourc... It’s their official

https://en.wikipedia.org/wiki/Wikipedia:Use_of_primary_sources_in_Wikipedia https://en.wikipedia.org/wiki/Wikipedia:Use_of_primary_sourc... It’s their official policy.