Concerning the survey. The questions asked and the analysis of responses is neutral. It looks perfectly respectable to me and appears to provide fair evidence within the limits of these things. As for a don't know-don't care question, it would be invalid. I went shopping to Asda this morning. As I perused the special offers, I neither knew nor cared about God or evolution. But when asked I drag them back to the front of my mind. The Gallup survey was non-tendentious. Within each of the three enquiries there would have been a wide spectrum of enthusiasm of response ranging from passionate to shrugging. No reason in the world for a fourth question. I'm glad to see how the results cause Joe such buttock-shuffling.