Jongdae: What's your blood type?
Minseok: How would I know?
Jongdae: How would you not know?
Minseok: Who am I, Karl Landsteiner, discoverer of blood groups?
Jongdae: You don't know your own blood type, but you know who discovered them?!

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Jongdae: What's your blood type?
Minseok: How would I know?
Jongdae: How would you not know?
Minseok: Who am I, Karl Landsteiner, discoverer of blood groups?
Jongdae: You don't know your own blood type, but you know who discovered them?!