Later in the week sceptics were struck by an admission from Professor William Schlesinger, a lead author for the IPCC. Since one of the enduring myths of our time is that the case for global warming is supported by "the world's top 2,500 climate scientists" on the IPCC, Schlesinger was asked in a public debate how many of its contributors are in fact climate experts. The best he could come up with was that "something on the order of 20 per cent have had some dealing with climate". (This will not of course stop the BBC calling any old evolutionary biologist or economist who supports its views a "leading climate scientist").