Here, There Be Dragons

Conversation with Rollie yesterday:

Rollie: "Mama, if I see a dragon, you will give me a knight, and I will knife the dragon."
Me: "Um, okay, if we see a dragon, I will let you have a knife and slay him. But you realize that we don't play with knives, ever, without Mama's permission?"
Rollie: "But, we do if there is a dragon."
Me: "Well, yeah, obviously. Also? A 'Knight' is the guy who wears the armor, and who holds a sword or a lance, or throws down the gauntlet, okay? 'Knight' just sounds like "knife." And you use a sword to slay the dragon, not a knife."
Rollie: "Right," he says, nodding his head vigorously in the affirmative.

Okay. It's a plan.