The signs looked auspicious at Tate Modern for the Patrons' Art Quiz. We were all divided on to tables named after art movements. Nicholas Serota, the Tate's director, and Peter Blake were Pointillists. Michael Craig-Martin, begetter of the Young British Artists, was a Pre-Raphaelite. I was on the Rubi-Conicals, whose meaning was a bit more obscure. It didn't matter: much more exciting was that we had Judith Keppel, the first winner of Who Wants To Be a Millionaire?, on our team. So we had at least one person familiar with a quiz triumph. Each table was equipped with a Tate curator and an artist. Our curator was in charge of the permanent collection at Tate Britain. Our artist was …