Reports concur, the Greeks are not bluffing.

Good. Maybe that message will sink in. It hasn't, up to now.

Sometimes people are just too bloody complacent about their own power to listen until you whack them in the head.

Greek premier Alexis Tsipras threatens Europe's creditors with a "big no" unless they yield on debt servitude

The radical wing of Greece's Syriza party is to table plans over coming days for an Icelandic-style default and a nationalisation of the Greek banking system, deeming it pointless to continue talks with Europe's creditor powers.

Syriza sources says measures being drafted include capital controls and the establishment of a sovereign central bank able to stand behind a new financial system. 

While some form of dual currency might be possible in theory, such a structure would be incompatible with euro membership and would imply a rapid return to the drachma.

The confidential plans were circulating over the weekend and have the backing of 30 MPs from the Aristeri Platforma or 'Left Platform', as well as other hard-line groupings in Syriza's spectrum. 

It is understood that the nationalist ANEL party in the ruling coalition is also willing to force a rupture with creditors, if need be.

. . . .

Mr Tsipras warned over the weekend in the clearest terms to date that Greece's creditors should not push him too far. 

"Our only criterion is an end to the 'memoranda of servitude' and an exit from the crisis," he said.

"If Europe wants the division and the perpetuation of servitude, we will take the plunge and issue a 'big no'. We will fight for the dignity of the people and our sovereignty," he said.

. . . .

The creditors argue that 'Grexit' would be suicidal for Greece. 

They have been negotiating on the assumption that Syriza must be bluffing, and will ultimately capitulate. 

Little thought has gone into possibility that key figures in Athens may be thinking along entirely different lines.

Tasos Koronaki, the party secretary, said on Sunday that attempts to split the party will fail. 

"The government will not enter into any agreement that is not accepted by the parliamentary group. We are more united than ever," he said.

Finance minister Yanis Varoufakis told Greek television that his country cannot accept an "unachievable fiscal plan" and warned creditors that the minimum damage from Grexit would exceed €1 trillion for the European financial system.