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The term "Smooth Brain" refers to someone [unintelligent], or an action that could be classified as [unintelligent]. Neuroscientists believe that the more folds your brain has, the more surface area neurons have, thus, leading to higher [intelligence]. However, without these folds, there won't be as large of a surface area for your neurons, which leads to idiocy, or Smooth Brainedness.
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