Due to the daily coarsening of civil discourse on social media, routine conflict resolution has gone out the window. If that is all kids see, then that is all they learn for their future.
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Race, age and other demographic factors are commonly controlled in epidemiology studies. It makes no sense to compare one group to another group if researchers do not bother to control for confounders – that is, factors like race or age that can cause researchers to draw the wrong conclusion.