As this analysis relied upon the most optimistic assumptions, real world limits to tree plantation ignored and optimal yield was used.
But there is going to be a lag, even on the most optimistic assumptions, before renewables can take the place of coal.
The first report warned that on the most optimistic assumptions, the NHS budget would have to double to £154bn to provide good quality care in 20 years' time.
But even under the most optimistic assumptions, Scotland would likely face a steeper challenge than the rest of the UK, it added.
But critics say that, even on the most optimistic assumptions, nuclear power will contribute only about 4% of India's power-generation by 2020.
Even under the most optimistic assumptions, there will be a shortfall in the care workforce of 200,000 by 2020, according to research into migration and the care workforce published by Independent Age and ILC-UK earlier this month.
Because it means, even on the most optimistic assumptions, the OBR is going to tell the chancellor that the structural hole he set out to fix is actually larger, now, than when he took office.
Under the report's most optimistic assumptions, 6.5 million plug-in hybrids could be sold annually in the United States by 2030, out of total sales of 19.4 million vehicles.
Even on the most optimistic assumptions about technological innovation, it suggests, America will not be able to make a dent in its greenhouse-gas emissions without some form of tough-nosed mandatory federal laws.So will it ever happen?
The level of share prices is hard to justify even on the most optimistic assumptions about future profits; the stockmarket boom is starting to spill over into other assets, such as prime city property and fine art; there has been a surge in borrowing by firms and households; and the current-account deficit has risen to record levels.
