I am confused on how to source with purpose. Thanks!
An easy way to source for purpose, is to consider the desired action from the document. What did the author want to have happen as a result of them creating this document?
for example, you tell me on the day of the exam that your dog died last night, you did not tell me this because you think I care about your dog, you told me this because your purpose is to get out of the exam. purpose is not immediately obvious