#BinaryThinking - The tendency to see the world in black-and-white terms, dividing everything into two absolute and opposing categories—such as good vs. evil, success vs. failure, or right vs. wrong—while ignoring complexity, nuance, and the shades of gray in between.
In terms of Elephant Theory, liberals often default to binary thinking as a way to stay morally consistent while remaining evolutionary open to others. Conservatives, as they are forced to be more grounded due to the real-world trade-offs and dynamics within their herd, tend to default to real world thinking. However, they will often exhibit binary thinking when they feel the need to defend their herd.