Cameron keeps schtum on Lisbon
So what does the self-proclaimed "straight talking" guy say about one of the biggest foreign policy dilemma he's likely to face if he becomes prime minister?
Nothing. Nowt. Nix. Zippo. Zilch.
David Cameron's official explanation for not telling us what he'll do if the EU's Lisbon Treaty is law by the time he reaches office is that "you can only have one policy at a time". He adds that he doesn't want to do anything to "undermine or prejudice" the ratification proceedings in Poland and the Czech Republic.
The real explanation is that he is determined that his last conference before the election will not, to use his phrase, "obsess about Europe".
This is, however, a crucial test of how Cameron will weigh up principle and pragmatism.
A principled Euro-sceptic approach might argue that the British people deserve their say on Europe whatever has been decided elsewhere.
That is what Boris Johnson appeared to back yesterday before hastily getting his spokesman to brief that he was only calling for "an urgent opportunity for the British people to have a say on this treaty before it takes force".
A more pragmatic approach might reply that unpicking a law ratified by
27 nations would not only be nigh on impossible but also a serious distraction from what needs to be done to sort the economy out.
The signs are that Cameron is veering to the latter but would prefer to unveil what some in his party will see as a betrayal when they are not all gathered in one place.
Intriguingly, there are signs that some of the biggest Euro-sceptic cheerleaders in the Tory press may be coming round to this pragmatic position.
Yesterday, my colleagues at the BBC reported that Cameron's referendum pledge remained unchanged.
I joked with one senior Tory that the headline should have read "Betrayal postponed". He smiled before chastising me for my cynicism.
13:20GMT: Is the Czech in the post?
The Tory Chairman Eric Pickles has told the BBC that he is "confident" that the Czechs won't have ratified the Lisbon Treaty by the time of the next election and, therefore, that he's confident that his party will still be promising a referendum on the EU.
What does he know that we don't? Up until now it has been assumed that the Czechs will finish their ratification process in three to six months.
We do know that David Cameron has written a letter to his Euros-ceptic friend, the Czech President Vaclav Klaus, but we don't know what that letter said or what reply - formal or informal - he received. Perhaps Mr Pickles should tell us.