Spinning or just a lie?

The Treasury argument that it was the CBI that asked for the Pension Fund taxes in 1997 seems to have just helped Gordon Brown dig an even deeper hole for himself, with the then CBI chief, Lord Turner, saying that no such request was made.

Now I know this is one argument pitted against another, so we will never truly know who is telling the truth (although I know who I believe), but this does beg the question, when does spinning become lieing? Spinning is about twisting information to present your own case in the best possible light. Surely making up information, which is what seems to have been claimed here, is downright deceit?