- Why have you taken the new position?
- Why did you take the old position?
For instance, Nick Clegg on tuition fees has been trying to focus on the first question, allowing him to plead the necessity of tough decisions, while avoiding the second: the issue of whether his pre-election promises were idiotic or dishonest.
In the case of David Cameron’s very recent decision to put his personal photographer and film-maker on the public payroll, and his decision today to take them off it again, the only explanation we have so far is:
A source has told the BBC that Mr Cameron now accepts it "sent the wrong message" to employ them at a time of public sector job cuts.
From this we can see that the answer to both my questions above is: ‘To make me look good.’