One must also develop and put forward a credible Plan B – the implied threat that drives forward negotiations on Plan A. Greece’s finance minister, Yanis Varoufakis, knows this very well. As the Greek government’s anointed “heavy,” he is working Plan B (a potential exit from the eurozone), while Prime Minister Alexis Tsipras makes himself available for Plan A (an extension on Greece’s loan agreement, and a renegotiation of the terms of its bailout).