22 September 2016 - native speaker

space alien: And so it is that a native speaker has language knowledge deep, wide, and robust.
test subject 1: Jeez, whatevs.
space alien: And flexible! The thought fills me with unwonted joy.
test subject 1: You’re weird. Everybody wants joy.
space alien: And yet it is not enough.
test subject 1: Aristotle said so.