Spot the Not #154 - mistakes were made...

All of the following are real quotes from politicians except one. Can you Spot the Not?

1. Mistakes were made. Then, other larger mistakes were made.

2. Mistakes have been made, as all can see and I admit.

3. Serious mistakes were made.

4. It is quite possible that mistakes were made.

5. Mistakes were made in terms of comments.

6. Serious mistakes were made.

Ah, the glory of the passive voice. It is the prevaricating politician's perfect pal.