Manager: We (meaning you) need to do task A. How long will it take?
Me: Task A will take X days to do.
Manager: That seems awful long.
Me: How long do you think it should take?
Manager: It surely could not take any longer than Y days.
Me: Ok, it seems you have an answer to your question then.
Later:
Manager: It’s been Y days, why isn’t task A done yet?
Just take his word as straight as you can make it. Mail to management that Mr. Sarcasm (in CC) said the document was written with added graphics. Then wait for the inevitable “I didn’t mean it like that”.
Yes, exactly. Adding consequence is always a good way to make someone change their behavior.
Works wonders with my kids. If there’s no consequence, there’s no change.