I am not exactly sure what you mean by that but I think the answer you are looking for is:
it is a motto, usually used to bring people together. Strength in numbers. two is better than one
Say what now? I did not undersytand that sorry, whoops
D in most books flashbacks are used in a lot of different forms
Answer:
it controls which sources to use.
The purpose is to help the reader/student/? understand the subject at hand and make it easy to get evidence for your claims/ideas.
