We like to believe that intelligence is a suit of armor—a shimmering, logical barrier that protects us from the arrows of nonsense. We assume that the more "brainpower" someone has, the more likely they are to follow the breadcrumbs of evidence straight to the cold, hard truth. It’s a nice thought. It’s also wrong. In reality, high intelligence often functions less like armor and more like a high-end toolkit for building more elaborate delusions.