We are to explain if a message should one or more clear purposes
it is false that "A message must have only one clear purpose."
A message can have as many purposes as possible. It could be one or more.
Therefore, it is false that "A message must have only one clear purpose."
A message is a means of conveying information from one person to another or from the source to the recipient.
A message can be sent through various means such as mail, text, courier service etc
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