At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
What do you mean?
It is important in general to get the "absolute facts" in history. But what's important is the understanding of what happened, and around when it happened.
I would argue there is no such thing as a historical fact, only accounts of history. The statement: President John F. Kennedy was "assassinated," may be true to many of us. However we only have accounts and explanations of an assassination. Historical research lends into several theories into each historical event.
Is it a fact that President John F. Kennedy was assassinated? I would argue no. There are so many theories to his death, and there are so many theories and accounts so different historical events we can only have historical analysis.
When engaging in historical research it is difficult to prove whether or not primary sources have a bias or a hidden intention. It might not have wrong intentions, but we simply do not know that. There will constantly be differences from what you believe history is and what I believe history is.