Often we hear in news print don't believe everything you read. With blowhard speakers at every soapbox on TV and in meetings we attend, we think don't believe everything you hear. With the Internet it is almost the NORM that what you see is not true.
BUT our biggest obstacle to sifting through things in our life is between our ears...
DON'T BELIEVE EVERYTHING YOU "THINK"
We need to try to put in an opposite thought and shake it around awhile. In business, ways of prospecting, meeting people, systems, time management etc. In the world, climate change, evolution, politics, religion, businesses to work in or stay away from, technology dos and dont's, all sorts of things. Challenging YOUR OWN BRAIN, many times keeps you sharp. Don't have a dull brain. Don't believe everything you think.