Two of the eight experts who predicted that the currency would survive said it would do so only at the cost of seeing at least one of its members default on its sovereign debt. Andrew Lilico, chief economist at think tank Policy Exchange, said there was "nearly zero chance" of the euro surviving with its current membership, adding: "Greece will certainly default on its debts, and it is an open question whether Greece will experience some form of revolution or coup – I'd put the likelihood of that over the next five years as around one in four."