"Can you do this?"
Sure, give me the information I need...

"We don't have all of it yet"
So I can't do it then

"Well when can you do it"
When you get the information

"Do you need *all* of it"
Well, it's either I do half a job and waste my time, or get it all done in one shot

"The client wants it tomorrow"
When will we have the information?
"We don't know"
Well they aren't having it tomorrow then, are they...

Sales people... don't care *how* things work, as long as they get a tick against their name to show they've sold something...