Communication is perceived to be a two way street, but is often a battlefield. How often do you feel you are not being heard? Ever tried saying it louder and repeatedly, with no effect? It’s a bit like the stereotype of the English speaker talking to someone with no knowledge of the English language; “if I enunciate clearly and slowly, surely they will understand?”
Sometimes it’s because we hear what we want to hear, sometimes we just zone out and sometimes we haven’t got a clue what the other person is talking about.
There is a theory that the student doesn’t fail the course, it’s the teacher that fails. If someone doesn’t understand what you are hoping to impart, whose fault is it?