You might only argue is it true what they wrote. Did all four people lied? I
Many time not so clever people think for example that Herodotus was a bad historian because he written down believes of ancient people. Its history of many mysteries, myths, fantasy beings like werevolves, giants and so on. Herodotus was genius because one needs to wrote down all because we need to understand beliefs of ancient people if we want to understand them and theirs/us history.
Herodotus wanted to understand Greek Persian wars so he start writting. Livy wrote Roman history and myth about brothers fe by wolf. Many historians dont think thats true story. Not true=Not important. You see those historians are bad historians like bad cops, bad doctors. Everything is important. How they dress, what they ate, what they believe?
I can quote you many historians in purpose that you understand what is history book.
You see I asume your 1st language is english. In english you have two words "history" and "story" but in French which is I think language id far richer (imo-no offence) then English they have only one word for "history" and "story" - histoire.
Historians trough history didnt wrote as todays historians wrote. History is science and therefore self correcting.
Or you can say different about history is inquiry so that we have history and historiography.
Start with Herodotus.
But there is a difference between using facts which is history. And making stuff up which is Fiction.....