A social stratification can be rigid.Logical formLearned from9 sentences. Orders can be rigid.Logical formLearned from9 sentences. Guidelines can be rigid.Logical formLearned from9 sentences. A silicon can be rigid.Logical formLearned from9 sentences. (Freezer containers) can be rigid.Logical formLearned from9 sentences. (Class divisions) can be rigid.Logical formLearned from9 sentences. A hand can be rigid.Logical formLearned from9 sentences. A male may sit rigid.Logical formLearned from9 sentences. A respect can be rigid.Logical formLearned from9 sentences. Tenets can be rigid.Logical formLearned from9 sentences. (Safety practices) can be rigid.Logical formLearned from9 sentences. A (salary cap) can be rigid.Logical formLearned from9 sentences. Sets can be rigid.Logical formLearned from9 sentences. Branches can be rigid.Logical formLearned from9 sentences. Relationships can be rigid.Logical formLearned from9 sentences.