Brainworms are ideas or concepts that lodge in the mind and are difficult to forget. They rely on principles of neuroscience such as triggering novelty responses and forming new associations when surprising people. Emotion and memory are centered in the hippocampus, which is also responsible for smell. Vision is processed in the brain, not the eyes, and involves systems for movement, context and aggregation. Attention and context facilitate visual processing. People use mental anchors to assemble memory and make decisions closer to reference values in negotiations. Recognition depends on visual processing, context and culture.