Climate models loaded with invalid assumptions?

Daily Caller:
Climate Models Have Been Wrong About Global Warming For Six Decades

...
The Cato scientists argue “climate sensitivity” estimates are too high and are causing climate models to over-predict how much warming will happen with increases in greenhouse gas emissions. Climate sensitivity refers to how much warming would occur with a doubling of atmospheric greenhouse gas concentrations.

Climate scientists typically put climate sensitivity at 3 degrees Celsius, but a slew of new studies suggest that’s way too high an estimate based on how much warming has been observed in recent decades. One estimate put together by the U.K.-based Global Warming Policy Foundation last year found climate sensitivity may be as low as 1.75 degrees Celsius — almost half what mainstream climate models use.
The fact that the projections have been so consistently flawed is evidence of an invalid assumption.  That they keep making the same mistake over and over suggest something other than scientific inquiry.

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