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When you think way too much about something you don't know anything about and act like you're some kind of genius, even though you're clearly not.
I thought about the meaning of life for 10 minutes and now I'm arguing with my dog about it.
She spent 2 hours figuring out how to open a can of soda and now she thinks she invented it.
He started a debate about the color of the sky during a thunderstorm and lost his mind.