To understand the question, you have to follow the link and then examine what WikiTree tells us about the confidence of the relationship. In this case, every connection between the two parties is marked as "Confirmed with DNA", which is as confident as it gets on WikiTree. Nonetheless, WikiTree then goes on to say that "therefore the combined relationship is of Unknown Confidence Level."
Doesn't make any sense to me either, so I had to go look one of my DNA Confirmations and test the relationship. Sure enough: "therefore the combined relationship is of Unknown Confidence Level." So, then I tried my brother, with whom I have confirmed atDNA match on both sides and on xDNA. Wouldn't you know it: "therefore the combined relationship is of Unknown Confidence Level."
What does it take for WikiTree to express its confidence in our DNA Confirmations?