Joshua Sherman, who lives near Vancouver, Canada, is preparing to pitch an idea for a social gaming Web site to a group of angel investors. The site has some new and novel aspects to it. He made a practice presentation in front of his advisory board, and one question that an adviser urged him to prepare for is “If you’re successful, what’s to prevent Facebook from launching a similar product?”

Joshua frowned, and said he thinks it’s unlikely he’ll be asked that question. What do you think? If you were Joshua, how would you prepare to answer that question?