[passerby1]

Following the logics of requiring an official government-issued docs, is it required for any fact written in Wikipedia, or where they draw the line?

In other words, how exactly is the "common knowledge" separated from the "controversal" one, which requires a proof to present to self-appointed guardians of the True?

[kens]

The official Wikipedia rule is that all material must be verifiable from a reliable source.

There is a whole lot of policy and debate behind that rule; for a start see https://en.wikipedia.org/wiki/Wikipedia:Verifiability and https://en.wikipedia.org/wiki/Wikipedia:Reliable_sources

[justsomehnguy]

> where they draw the line?

Where the king of the article hill would decide.

[teddyh]

https://en.wikipedia.org/wiki/Wikipedia:You_don%27t_need_to_...

[techdragon]

https://en.wikipedia.org/wiki/Wikipedia:You_do_need_to_cite_...