My son was watching me create my database for agent queries...
Son: Mom, how many agents are there in the world?
Me : Hundreds. Thousands. (admittedly distracted)
Son: That's great, mom!
Me: Great? How's that great? (Bear in mind, I'm in the throws of reading hundreds...thousands of agent websites...)
Son: Because you only need one to say yes!
And there it is: Aha!