Everybody is a sales person. How true! I remember when I was in graduate engineering school many years ago and of course I thought I knew everything, I used to look down on sales people. One day I made a derogatory comment about salesmen to my engineering professor who at that time also had a thriving consulting business going. He glared at me and said “Never lose sight of the value of a great salesman”.
Ten years later, when I was working for a small consulting firm, the owner of the company used to send out a note to all his employees that read” “Nothing happens until somebody sells something.”
So next time when you make a presentation, just remember that you are the proverbial sales person SELLING something to the audience.