What's the difference?

Conversation that Kenyon and I had in the car yesterday while driving past a big farm..

Kris: "Wow - Look at that!"
Kenyon: "Oh - those are Elk, for a second I thought they were Reindeer"
Kris: "Aren't Elk and Reindeer the same thing"?
Kenyon: "No!"
Kris: "What's the difference?"
Kenyon: "Elk are wild"

Voices in Kris' head: "Oh and Reindeer live at the North Pole with Santa, so they are not wild."

Hmmmm...