An entrepreneur is someone who is bringing his own vision into a world where such an idea has never existed. He needs to realize that there will be many loopholes in his idea which may place him in the grey areas while explaining his concept to others.
An entrepreneur needs to be fully prepared to handle tough questions on his ideas because people need to feel relaxed and assured that an idea is good before they invest in it. An entrepreneur needs to have a good amount of tolerance for ambiguity.