I had to look that up. As unusual as that rule sounds at the first glance, they do explain the reasons behind it quite well. https://en.wikipedia.org/wiki/Wiki

I had to look that up. As unusual as that rule sounds at the first glance, they do explain the reasons behind it quite well. https://en.wikipedia.org/wiki/Wikipedia:No_original_research#Primary.2C_secondary_and_tertiary_sources https://en.wikipedia.org/wiki/Wikipedia:No_original_research... https://en.wikipedia.org/wiki/Wikipedia:Verifiability#Original_research https://en.wikipedia.org/wiki/Wikipedia:Verifiability#Origin...