How can a source be a primary and secondary source?

Answer:
A primary source is like a car crash. For example, John was a witness and is there for a primary source because he was there and knows what happened. But lets say Jim, who only heard the car crash and did not see what happened, is there for a secondary source because he doesn't know what happened.
First answer by ID3391451878. Last edit by ID3391451878. Question popularity: 2 [recommend question].