8.What calibration studies have been performed? Rescaling steps seem to suggest that the correlation must be near
100%. Is that the case? How are the
confounding variables removed?
9.The temperature proxy search is a regression problem. Why
should one choose to use principal components (not appropriate for finding a nonstationary mean)?
10.What weights are used to combine different proxy types?
Why?
11.If the data are not a random sample, then what confidence
can be given to any modeling and to any
Òerror barsÓ? Why pointwise confidence
intervals in place of confidence bands? Is new theory needed?