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‘Twas the day before Christmas… 9yo: what’s that? (Gestures at whiteboard) Me: some ideas on p-vs-np 9yo: what’s p-vs-np? 🧐 Me: a famous math/cs problem 9yo: can you tell me more? I see you’re working with factorials Me: how far down this rabbit hole do you want to go? 9yo: 😂 …all the way 😐