That was a great answer.
You talked about the PBO. There was a note made by the PBO that there's a discrepancy between the fall economic statement and the supplementary estimates (B). That discrepancy is a large amount. I believe it's into $20 billion-plus.
Can you shed some light on why there's such a discrepancy and how it could be explained in a very simple way to the Canadians who are interested?