When is a question not an invitation to discuss? When Guardian Australia holds a forum called ‘Why Knot?’ on the subject of marriage equality. Billed as bringing together a ‘broad range of voices’, every single speaker — including David Marr, Rodney Croome, Kristina Keneally, Van Badham, Bill Shorten and Richard Di Natale — were full-throated supporters of marriage equality, and in furious agreement that the Australian people must not be allowed have their say on the issue at a national plebiscite.