Even in the first years, they suffer from the simple fact that you can't present something correct and useful in a small popular talk with no pre-requisite shar

Even in the first years, they suffer from the simple fact that you can't present something correct and useful in a small popular talk with no pre-requisite shared knowledge. Its "empty calories" that makes it feel like you learned something but its really just entertainment. Neil Postman in "Amusing Ourselves to Death" regards these types of talks as more pernicious than things like reality TV that don't claim to provide any useful information.