Domain-specific knowledge. My co-worker designs complex machinery in solidworks like the best of us, but he keeps capslock on and navigates to google.com before

Domain-specific knowledge. My co-worker designs complex machinery in solidworks like the best of us, but he keeps capslock on and navigates to google.com before doing a search. There are many people like him, who learn the things they need to learn and don't make any headway on the rest.