Communications between pilots and controllers is essential to the successful operation of the ATC system. Communications between controllers is also essential. A standard phraseology has been developed to avoid ambiguity in communications. However, the standards are sometimes violated by using other jargon and than may have consequences.
Discuss the importance of clear unambiguous communications between pilots and controllers and between controllers in the safe and expeditious operation of the air traffic control system. In your initial post, cite some examples of the consequences of ambiguity in communications either from your own experience or research some of the accidents and incidents from NTSB or ASRS where ambiguity in communications became a safety hazard.
Here is an example from my experience: