[StainlessSteelCynic]

I'd say that what this really shows us, is that the reality is often a complex beast that few historians have managed to capture in its entirety. That is to say, there's a lot of events that have escaped general attention and even for historians and researchers, people don't often have a 100% full picture of the event.

For example, I've found in my own research on Cold War era military vehicles that many well known and credible authors have made some simple errors that should not have happened and the reason for this is that many, under a deadline, don't research the topic as well as they should and they fall back on earlier authors and the body of work they produced as the primary source material.

As an illustration of this, I have a book by Greenhill, a company just as reputable as Jane's Information Group. The book claims to list "Over 800 vehicles from 1915 to the present, every armoured fighting vehicle that has ever existed". Ignoring the bit about "to the present" as the book was published in 2000 but within 10 minutes reading I found at least five vehicles that were not even referenced let alone included and I don't mean such things as obscure one-offs from some design group in Nazi German.
They failed to list significant vehicles like the Canadian Bobcat APC, the Swiss MOWAG Typhoon or the US airportable T92 light tank.

The point being, they didn't dig deep enough and they instead used earlier sources that were themselves incomplete. They were then unable to present a full picture but they themselves were also apparently unaware of this lack of knowledge.