Final answer:
Historians must reflect on their biases and examine their own perspectives to ensure their arguments are based on facts and sound evidence.
Step-by-step explanation:
When studying the history of history, it's important to realize that every historian must reflect on their biases and how they affect their interpretations. Historians have the responsibility to ensure their arguments are based on facts and sound evidence. They need to examine their own perspectives and strive for impartiality in presenting the past.