  vg2xt5jy&t=1206s at 0:15:35, chris langan 'unintentionally' gives a good explanation of what common sense is, and its relation to iq. he never uses the words 'common sense' but that's how i interpret it. if iq is the ability to focus, plus the depth of that focus, then common sense is the aperture of that focus. wider apertures yield higher levels of common sense.
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