What clues should you look for to determine if an authors purpose is to persuade

How does dr. king's understanding of "outsider" compare to the understanding of the writers of "a call for unity"? question 2 options: dr. king agrees with the clergymen that "outsiders" should not be involved in local conflicts because they makes things worse. dr. king defines himself as an "outsider," but the clergymen think he is an "insider." the clergymen define "outsider" as anyone anywhere who disagrees with their point of view and "insider" as anyone who agrees with them. the clergymen believe anyone outside of their city is an "outsider," but dr. king believes anyone in the united states is part of one common community.