Dynamics can be rigid.Logical formLearned from4 sentences. Techniques can be rigid.Logical formLearned from4 sentences. (Classification schemes) can be rigid.Logical formLearned from4 sentences. A pacing can be rigid.Logical formLearned from4 sentences. Standards can be rigid.Logical formLearned from4 sentences. (Time schedules) can be rigid.Logical formLearned from4 sentences. A debate can be rigid.Logical formLearned from4 sentences. A tether can be rigid.Logical formLearned from4 sentences. A literalism can be rigid.Logical formLearned from4 sentences. A card can be rigid.Logical formLearned from4 sentences. Handling-machines can be rigid.Logical formLearned from4 sentences. An ancient law can be rigid.Logical formLearned from4 sentences. (Dive sticks) can be rigid.Logical formLearned from4 sentences. A wire can be rigid.Logical formLearned from4 sentences. Needs can be rigid.Logical formLearned from4 sentences.