David Cameron and Alex Salmond have clashed over the future of Scotland's oil and gas industry as they held rival Cabinet meetings within a few miles of each other. The Prime Minister warned that leaving the UK would harm the key sector.
In isolation these issues do not seem to be game-changers. In the main there has been only very marginal shifts in polling off the back of these big debates, over currency and Europe and this week over North Sea oil reserves.
I think to win this referendum the two sides will have to work not just on these intellectual and political arguments but also on the answer to a far deeper and more complex question that voters will ask themselves at the ballot box, and that is: who do we trust more?
David Cameron is expected to claim that only the UK Government has the financial muscle to boost oil production in the North Sea.
Is it a coincide the Cabinets of both the UK and Scottish governments are meeting in Aberdeenshire on the same day? Of course not.