A number can be rigid.Logical formLearned from8 sentences. A simplicity can be rigid.Logical formLearned from8 sentences. A single speed can be rigid.Logical formLearned from8 sentences. A selection can be rigid.Logical formLearned from8 sentences. An assembly can be rigid.Logical formLearned from8 sentences. Soles can be rigid.Logical formLearned from8 sentences. A border can be rigid.Logical formLearned from8 sentences. A puritanism can be rigid.Logical formLearned from8 sentences. A communist ideology can be rigid.Logical formLearned from8 sentences. An organ can be rigid.Logical formLearned from8 sentences. A (metal frame) can be rigid.Logical formLearned from8 sentences. Struts can be rigid.Logical formLearned from8 sentences. A band can be rigid.Logical formLearned from8 sentences. Tectonic plates can be rigid.Logical formLearned from8 sentences. Mindsets can be rigid.Logical formLearned from8 sentences.