At 5:14, the story, about the fort planner who calculated the bricks used for the walls and towers, is most likely false! Based on the fact that in any large construction, there are accidents like dropping things and breaking materials. It is inconceivable that no bricks were breaking and dropped. And no one can predict before hand as how many bricks will be broken. Thus, the planner can't predict the number of bricks used so precisely. The conclusion: FALSE story!!