A survey company decided to do a world survey on a very important issue. The question was the following:
”What is your opinion on lack of food in the rest of the world?”

The survey was a total disaster as the question was not properly formulated. Too many words were ambiguous:

In Africa, people did not know what food was.
In Western Europe, people did not know what lacking something meant
In Eastern Europe, people did not know what an opinion was.
In the United States, people did not know what the rest of the world was.