What is the importance of knowing multiple perspectives of a historical event

So then you can see parts of history in a different light (from the other perspective). This also helps to have a reliable source of what happened if the said perspectives have similar aspects. Hope this helped :)

it determines which accounts are biased about the event

Explanation:

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.

feel very well should be good