[js8]

I am just having a similar problem at https://en.wikipedia.org/wiki/Wolfgang_Haken

There is no source that would prove that Armin Haken is his son, and so unfortunately Armin's work cannot be mentioned in the context of the article, as apparently somebody tried to do before me. (I actually read Armin's article that was mentioned on Wikipedia and then encountered Wolfgang Haken in a different context, and I was wondering if he is the same guy.)

So, the usability of Wikipedia is decreased (ironically, it can still be found in the history). I wish they took a more nuanced view on source reliability than just black and white.