both Bill Gates and Mark Zuckerburg (of Facebook) were college dropouts, but we cannot conclude from this that EVERYONE should strive to be a college dropout.The same is true regarding sleep.Some successful individuals get little sleep at night, but most people need more sleep.I read somewhere that Jeff Bezos of Amazon, gets a full night's sleep each night.the question of the day is: with regards to systemic barriers what is this a a barrier to what___________?Also, please give an example.