[hubert123]

Why would you ever say things that are untrue? You are simply a lier then. Saying "yes" even though you DONT actually know if you can make it is a lie. You are lying to your manager. Tell him that it's probably gonna be close, and other work might suffer or even that work in particular. I mean why on earth WOULDNT you tell him that? It's not like this won't come up immediately anyway when you inevitably don't finish or don't finish properly.

[amelius]

Well, in principle you are right, but it sometimes goes like this:

https://www.youtube.com/watch?v=BKorP55Aqvg