Yanis Varoufakis, the finance minister, sought to silence such talk over the weekend, telling Associated Press that a default to the IMF was out of the question, even if a halt in payments to the EU institutions remains a serious threat. “We are not going to be the first country not to meet our obligations to the IMF. We shall squeeze blood out of stone if we need to do this on our own, and we shall do it," he said.