The Liberal Democrat Treasury spokesman, Vince Cable, said: "Alistair Darling has relied on implausible growth forecasts for the economy which nobody but himself believes.
It was far faster than the annual growth rate of the American economy, which made the forecasts implausible to begin with.
Italy's prime minister, Giuseppe Conte, has dismissed the commission's forecast as "implausible", insisting that the budget will steer growth towards 1.5% of GDP over the coming year, compared with the commission's latest forecast of 1.2%, while reducing the deficit.
And its unhappening dictated much of the autumn that followed; steady employment, the Fed raising rates in the US, an otherwise implausible-sounding growth forecast that allowed George Osborne to find several squillion down the back of the sofa and miraculously make the tax credit cuts go away, and thus the chancellor becoming more and more convinced he has a shot at the Tory leadership in 2019.
He added: "Your unrealistic oil forecasts lead to implausible expectations of a separate Scotland's fiscal position.
He said their forecasts were "so implausible they really should be dismissed out of hand" and declared there was no way the Bank of England would agree to remain the lender of last resort to an independent Scotland.
He said their economic forecasts were "so implausible they really should be dismissed out of hand", making reference to falling North Sea oil production.
He said: "Barring revisions, borrowing would have to be an implausible 48 per cent lower year-over-year in the second half of this fiscal year for the official forecast to be met".
10. George Will, a veteran with a long history of incorrect forecasts, predicted a romp for Romney, whom he had previously discounted as an implausible candidate.
And the government-funded UK Energy Research Centre UKERCC) said forecasts suggesting oil production will not peak before 2030 were "at best optimistic and at worst implausible".
