We know it's hard for people to keep up with the various stories on offer from the motley crew of MPs and senators dragged off to the High Court by their citizenship status. Keeping track of Malcolm Roberts' various accounts proved tough even for his own lawyer, who appeared to more or less give up on him and told the court it should make up its own mind about how credible he was.

But Matt Canavan, too, has shown a considerable degree of flexibility in his account of his citizenship. Back in July, the senator for the great state of Denial blamed his mum, telling us