`  :Someone who is more au fait with the sources may have an answer. The ultimate WP tests are verifiability and reliability. But verifiability takes precedence, in my opinion. It can lead to daft results where something which might be true cannot be verified but something which is not true can be verified - one has a reliable source, the other one is, for example, just plain old common knowledge.  :On the odd occasion that I've hit the sort of mess you mention above, and in the absence of a source to prove one way or the other, I've tended to present all the possibilities. But this is dangerous territory: you are admitting to a potential discrepancy (good, because the new reader is then aware that the article appreciates a possible anomaly) but potentially inviting comments about ``original research`` (bad, according to WP policies).  :Hopefully someone with more experience - either in this subject or in WP policies - can resolve the issue. In the interval, keep calm and carry on. -   `