<i>Why don't they do their own [temperature] reconstructions? If they want to criticise, they should write their own papers</i><p>Didn't Jon Graham-Cummings just publish an article about having done just this, and finding an error in the data?<p>Of course, people like JGC couldn't do so before, because Jones and his colleagues kept the raw data secret.<p>Edit: here's JGC's posting about his article: <a href="http://news.ycombinator.com/item?id=1128782" rel="nofollow">http://news.ycombinator.com/item?id=1128782</a>