Your original question is invalid because the questioner would never ask it if they only used E-Prime. Let's re-phrase your question with E-Prime: "Describe E-Prime to me, I've never heard of it."

You get the idea now? The very form of the question affects your understanding of the answer. Through the description you receive, you begin to understand what E-Prime means to those that came up with it. In E-Prime, you literally can't state what it is to anyone else because that would go against E-Prime's rules.