Memoir is a personal legacy written so we can call it a historical source but not document. It is not an evidence, a report or not even a record. It is more like an autobiography or a biography from memorial times. It is a legacy written by a person for a person.
When you summarize, you take the main points of a story and write in in a few sentences. You want to make sure you hit all the key parts of the story and don't focus on the small details. If you were telling a friend about a movie you saw, you would by describe the major events, but not the little moments. That would be summarizing. You can do this with any book,movie,story etc. :)
Answer:
the answer is an eccentric scientist
