A scaffold can be rigid.Logical formLearned from12 sentences. Authority can be rigid.Logical formLearned from12 sentences. A (rotor system) can be rigid.Logical formLearned from12 sentences. A lattice can be rigid.Logical formLearned from12 sentences. An austerity can be rigid.Logical formLearned from12 sentences. Attachments can be rigid.Logical formLearned from12 sentences. (Class lines) can be rigid.Logical formLearned from12 sentences. Kinematic can be constituted-of-or-filled-with rigid bodies.Logical formLearned from12 sentences. Bounds can be rigid.Logical formLearned from12 sentences. Ceremonies can be rigid.Logical formLearned from12 sentences. An understanding can be rigid.Logical formLearned from12 sentences. A commitment can be rigid.Logical formLearned from12 sentences. A top can be rigid.Logical formLearned from12 sentences. A traditionalism can be rigid.Logical formLearned from12 sentences. A categorization can be rigid.Logical formLearned from12 sentences.