Suppose you want me to agree to a certain request. One way to increase the chances I will comply is first to make a larger request of me, one that I will most likely turn down. Then, after I have refused, you make the smaller request that you were really interested in all along. Provided that you structured your requests skillfully, I should view your second request as a concession to me and should feel inclined to respond with a concession of my own—compliance with your second request.
