Joshua proposed the hypothesis that, the amount of peripheral vision affects our brain’s ability to be become more or less perceptive and thus intelligence.
In his observations during his weekly lectures of his student in a local government education institution of higher learning, he observed that a segment of the student population in his class lags behind their mates as the classes progresses on.
He discover that these students have a common trait: all of wore a certain head dress. He noted that, it is NOT a racial problem as the segment of laggards are all although of the same race; he noted that there are others that do not wear th headdress performing and having improve just as well as the others in the class.
He suspects and thus hypothesize that the existence of the headdress prohibits the peripheral vision of the student mentioned. Much like how we prohibits side vision on our horses and cows, especially horses, so that we can control where it goes, as the animal is forced to only focus on wher it can see: turn its head left, and he will walk towards that direction.
He hypothesizes further that, if we can strategically place mirrors so that we can have even greater peripheral vision than we are by default, perhaps it is possible to acclimatise our brain into greater intelligence.
Interesting hypothesis (while i can only imagine how this was use to dumb down their people in a grand plan of controlling their subjects…)