For example, you never know what a driver going 60 miles/hr will do, but you do know that the laws of physics say that the driver can’t suddenly go backwards.
Once you figure this out, you realize you can work through absolute chaos because you can work with black boxes.
It doesn’t matter if the media is lying. For example, the source might say there’s this magic pill that has cured cancer, but if that were actually true, we wouldn’t have chemotherapy still. Therefore, without ever having to grapple with the question of the trust, the actual truth is bounded between “fake news” and “there maybe be potential new developments.” If you still care, you can still look into it, but 3 seconds of modeling already gave you a good black box answer.
What people mistakenly do is try to determine if the statement is true or not, but that’s a waste of time in most cases. It’s better to model the system enough to work within it and then move on.