It's a controversy surrounding the rules for the family-friendly card game UNO.
Apparently, a popular maneuver is, in fact, against the rules.
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UNO pointed out on Twitter that you can't stack cards.
The tweet reads, "If someone puts down a plus four card, you must draw four and your turn is skipped. You can't put down a plus two to make the next person draw six. We know you've tried."
The internet wasn't having it.
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Tracy the emotional support penguin tweeted, "I know this is literally your game that you made up but this is incorrect. I am sorry."
Apparently, people don't read card game rules but pass along the way they've always played.