The Prime Minister went to Scotland yesterday and confirmed his dad's name was Cameron, thereby putting the lie to those who have spent the last 19 months claiming the illegitimate alternative.
But it was doubtful that this honest admission would be enough to dissuade the five million other inhabitants with similar claims from voting to knock the U off the UK during his time in office. Clearly SNP leader Alex Salmond had rung up Central Casting during some moment of doubt in his campaign to lead Scotland and its oil in a different direction.
How about an Eton-educated millionaire, many of whose mates sound like him but own large swathes of your country, and who leads a political party whose Westminster representation can be counted on the finger of one finger? they said. Obviously Alex thought they were joking but yesterday David Cameron did indeed turn up in Edinburgh as the spokesperson for the "Keep Scotland English" campaign.
It says something for the paucity of those who would persuade the Scots that the UK is a better brand than independence that the Prime Minister -- for whom admission to a Scottish surname may well be held against him by some of the more recidivist wing of his party that had not made the connection -- was the best on offer.
Having spent many unhappy years in Westminster having his nose rubbed in his Scottishness, the SNP leader looked overjoyed at having such a prime example of why his country should go its own way standing next to him. Not that Dave didn't make the best of the appalling hand that fate had dealt him. Apart from claiming shared ancestry he did make a passionate appeal for continued connection between the increasingly disparate parts of the UK on grounds from cultural to economic.
But a sign of the hard case to make came after he gave as an example continued membership as a veto holder of the UN Security Council. No jobs for the Scottish unemployed in that, said a gleeful Alex, who was more than happy to repeat his mantra that the days of London lording over Scotland, not to mention it's First Minister, had well and truly passed. The Prime Minister wandered around the Scottish capital for a few hours like any other day visitor, first at the Firth of Forth for the 39 Steps experience and then to the shadow of Edinburgh Castle for the ignore-the-speech experience. Earlier he had been present when Pepsi-Co announced 30 new jobs.
He finally got in to see the First Secretary after lunch having first had to slip in through a side door to avoid protests over the effects of the Coalitions cuts on public services in Scotland. Then with all the pleasure Alex could muster he met the PM sitting in front of a wall map charting the extent of the SNP's domination of Scottish politics following the last Assembly elections.
There could be more goodies for the Scots if they voted to stick with the union, said Dave, and added to Alex's glee by refusing to say what they could be. With the alleged talks going just long enough for no one to say they had been a total waste of time, they ended with the admission that no progress had been made.
As Dave left, the SNP choir could be forgiven for delivering a chorus of that famous Scottish ballad : "Will ye no come back again."