There’s a joke, but it pretty well illustrates the difference. At a West Point physics class, the instructor said he’d give them a problm, and ask for oral solutions.
He said there was a 25-foot flagpole laying on the ground. It weighed 300 lbs. There was a cement block in the ground with a hole for the base of the pole.
As an officer, you have a sergeant and five privates at your disposal. How would you erect the flagpole?
Each cadet offered various ideas from block and tackle to a rope with a truck, etc.
After all had spoken, the instructions said, "Gentlemen, you are all incorrect. What you do is say, ‘Sergeant, get that flagpole up.’ "
As a Sgt. many, many years ago in the Army, I can vouchsafe for the accuracy of that policy. 