How to tell if someone is rigid?

How to tell if someone is rigid is by observing inflexible behavior, resistance to change, strict adherence to routines, difficulty compromising, black-and-white thinking, and emotional reactions when plans change, similar to noticing fixed system that cannot adjust. Signs someone is rigid include they insist on doing things only one way and become upset if routine disrupted, they have difficulty adapting to new ideas or feedback and dismiss alternatives, they follow rules strictly without considering context, they show all-or-nothing thinking like if not perfect then failure, they become anxious or angry when unexpected changes occur, they struggle to delegate or trust others to do tasks differently, and they judge others harshly for not meeting their standards. For example, rigid person may refuse to try new restaurant, insist on exact schedule, or react strongly if meeting time changed. In conversation, rigid person may interrupt to correct details, focus on rules rather than goals, and have difficulty seeing other perspectives. So to tell if someone is rigid, look for inflexibility, resistance to change, strict routines, unwillingness to compromise, and strong emotional reactions to deviation, indicating rigid personality that prefers control and certainty over adaptability.