How does this sentence violate the principles of objectivity in writing a summary?

"I believe that Common Sense presents arguments to convince the colonists of the need to free themselves from British rule."

Respuesta :

From the given sentence above, it violates the principles of objectivity in writing a summary because it states more of a subjective opinion rather than basing on a proven idea or statement. The words "I believe" made it appear that it is not objective in a way that it only refers to one's belief and judged according to the speaker's personal view. 
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