How does comparing different sources you get a more balanced view of the subject

I think because if people write something they give a bit of a personal view jn it (f.example if a person speaks about a battke they’ve won, they might not be telling about the other battles where they were lost)). If you use different sources, and compare then, you can substitute the facts out of it. I hope this can help you.

Try to go online and find the answer