There is a curious post over at CA about yet more TGGWS tedia… read on if you can bear it. This time the issue is the 1990 IPCC graph, which McI seems to accept uncritically despite its lack of good source (see wiki for more). TGGWS used the old graph uncritically; this is obviously wrong.
This looks like becoming the latest septic tactic: we must return to the Age Of Gold: in the Good Old Days there were graphs like IPCC ’90 fig 7.1.c (see the wiki link above) which, despite having no source at all, were Wot People Thought and therefore Must Be Good. Of course, if McI didn’t like the IPCC ’90 fig, he would be ripping into it as sourceless. But he likes it, for the obvious reasons, and so is kind to it (echoes of this).