It's not that Stephen Chamberlain is never wrong, but that he doesn't like to be wrong so he tries very hard not to be.

pal·imp·sest –noun
a parchment or the like from which writing has been partially or completely erased to make room for another text.
[Origin: 1655–65; < title="Click for more information about this dictionary" href="http://dictionary.reference.com/help/ahd4.html" minmax_bound="true">American Heritage Dictionary - Cite This Source - Share This
pal·imp·sest (pāl'ĭmp-sěst') Pronunciation Key n.
A manuscript, typically of papyrus or parchment, that has been written on more than once, with the earlier writing incompletely erased and often legible.