Former taoiseach and Fianna Fáil leader Bertie Ahern: in 2001, a Fianna Fáil-led government tried to ban opinion polls in the last week of an election. Photograph: Dara Mac Dónaill/The Irish Times

Eight out of 10 cats prefer a certain brand of petfood, according to the famous advertising campaign. The survey was ludicrous, of course, but it hasn(...)