Rock Paper Scissors is best for decision-making when you can't concur

https://rock-paper-scissors-z-w-t-r9-407.greyhavendaily.com/posts/a-step-by-step-guide-to-rock-paper-scissors-from-start-to-finish

Rock Paper Scissors is perfect for decision-making when you can't agree. Choose your gesture, count down, and let opportunity settle the argument.