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?