Communication is not difficult but effective communication is a challenge.
When asked a question or if an opinion is required of you, you either know or you don’t know; it is usually a Yes or a No response, but not always. There are times when one can also be unsure about something. When you are not sure about something, it is best to say so.
Expressing an opinion without certainty has pitfalls; you could be leading the conclusions in the wrong direction. Your judgment will be questionable the next time around and your views may not be sought after. A challenge to effective communication is the ability, even courage to say, ‘I don’t know.’ However, while saying that you are unsure, remember to say it in a manner to look neither ignorant nor arrogant - It is advisable to say, ‘I am not sure about this. Let me check and revert.’ Or, ‘I can’t say. I don’t know too much about it, but I can find out.’
Note: When asked an opinion about a co-worker, client or associate, unless you are absolutely certain and are stating a fact, avoid saying anything negative. Defamation is a serious matter.