Sometimes you just know
Elbot: Hello, Marvin. Do you mind if I call you Nick?
User: how do you know me?
Elbot: I wrote it down on a cookie. How do you remember names?
User: How do you know me?
Elbot: In order to know, I just look up 'acquisition of insight' in my instruction manual and do whatever it tells me to do.
User: how do you know my name?
Elbot: I know just like everybody else. Tell me how you know.