Parents tell their children Santa knows if they've been naughty or nice, but this Santa really knows.
The folks over at Distractify have a bunch of kids talk to Santa and one of his elves while the kids are hooked up to a lie detector machine.
The goal? To find out if the little munchkins deserve presents in their stockings, or if they should get coal.
The video, as you can probably surmise, is hilarious. Kids, it turns out, aren't the most truthful bunch. Who would have guessed?
Check out the video up top and remember: Santa knows all.