Systematic critique of UI information architecture and interaction design. Challenges whether elements should exist, what belongs together, and whether the logical structure of a component is right. Use when reviewing input surfaces, toolbars, action bars, compose flows, menus, or any component where the STRUCTURE (not style) needs questioning. Triggers: "review this UI", "does this make sense", "challenge this design", "IA audit", "interaction critique", "what's wrong with this component", or when a design review focuses on pixels before questioning architecture.