The absolute lack of rigor and the hand-waviness of the lesson makes this video a popular science segment rather than a math lesson.  A nice popular science segment, but I certainly hope MIT students of Physics and engineers are directed to take something with a higher level, significantly so.  Physics undergrads don't need total rigor, but such a total lack of it doesn't develop mathematical thinking.####[['lesson', 'Course_General_Feedback', 'NEG']]