However, there certainly was a strong contrast between Peter Robinson's dismissal of holding a border poll when talking to me on Inside Politics on Friday and Arlene Foster's hint on the Nolan Show four days later that the party might call Sinn Fein's bluff over a referendum.
However, while their business is now attracting a whole new set of customers - Apprentice fans looking for a souvenir picture - the brothers betray not a hint of the entrepreneurial spirit championed by the show.
The kind of certainty he expresses can only be explained by the combination of a strong belief and the conviction that the odd study that shows a hint of something going on must be right and the vast majority of studies that show no consistent effects must be flawed and biased.