An ordinary man has to communicate. The discussion has been talking to each other. Exchange of knowledge with which arise from two people and groups to exchange of knowledge, understand what you want to tell the other party understands.
Normal human need to communicate. Has been talk of dialogue, exchange knowledge with each other. This stems from two people and groups together to exchange knowledge to understand what I want to say to the other party.
Ordinary human need to be communicated. There is talk, discussion, exchange of knowledge together. Which arise from the two groups to understand and exchange the article knows what they want to say to each other.