A fact is: something that cannot be checked for accuracy something that can be checked for accuracy based on a person’s opinion a true piece of information

A fact is an item of knowledge, that is, a true belief that we are justified in believing as true. So by definition, a fact cannot be false. If a fact that was thought to be true is later found to be false, it is no longer a fact.

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the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.