Pop Quiz: The side dish at Thanksgiving that's orange and has marshmallows on it. Are those sweet potatoes or are they yams? Does anyone actually know if they are different things are just different terms? It's time to finally get some answers!

The people at Vox got to the bottom of the burning issue. They contacted the president of the Sweet Potato Council (because obviously there is a sweet potato council) and found out that this question has actually been debated in America for over 100 years.

Watch the video to get the whole explanation, and then feel free to be an arrogant smarty-pants when you explain it to everyone at the dinner table this Thanksgiving!