[cogitator]

This one fact along destroys the entire intellectual basis of the anthropogenic Global Warming theory - in pre-industrial 1100 AD Europe was 2 deg. C warmer than now.

Your statement is false in multiple ways. One, there is no data indicating, accurately and quantitatively, that the MWP was warmer than now. The intensive media and scientific examination of the "Hockey Stick" led to the NAS conclusion that paleoclimate estimation of temperatures more than 400 years ago does not yield sufficiently accurate data to allow comparison to modern temperatures. Secondary indicators like treelines do not allow statements beyond that it was warmer from 1100-1400 than subsquently in the LIA.

Secondly, the entire intellectual basis of anthropogenic GW is not based on paleoclimate. The basis for anthropogenic GW is the basic physical fact that increased atmospheric CO2 concentrations will alter Earth's radiative balance.

[AaronInCarolina]

The basis for anthropogenic GW is the basic physical fact that increased atmospheric CO2 concentrations will alter Earth's radiative balance.

Cogitator, please elaborate on what you mean by "Earth's radiative balance". Without detail, that phrase could mean almost anything.