The three most important things to understand. There are few absolutes, there will almost always be some evidence for and against everything, and most things exist on a spectrum often with the biggest concentration in the middle. ( Its even called the standard distribution. )

Yet it is hard to blame the population in general, for failing to understand those things. Because of course absolutes are a favourite tool of those wanting to deceive, abolish nuance and push hidden agendas. So that the worlds of media and conversation, even schools, are so filled with them, that they are accepted as the normal. Which not only pushes the chosen agendas, but also indirectly, that common practice actually trains people to think in absolutes, even more than they naturally would.