Categories can be rigid.Logical formLearned from6 sentences. An observation can be rigid.Logical formLearned from6 sentences. A perfectionist can be rigid.Logical formLearned from6 sentences. Tubings can be rigid.Logical formLearned from6 sentences. A period can be rigid.Logical formLearned from6 sentences. Counterparts can be rigid.Logical formLearned from6 sentences. A conscience can be rigid.Logical formLearned from6 sentences. A boss can be rigid.Logical formLearned from6 sentences. Prices can be rigid.Logical formLearned from6 sentences. Formulaes can be rigid.Logical formLearned from6 sentences. Rigid bodies may undergo motions.Logical formLearned from6 sentences. (Eligibility requirements) can be rigid.Logical formLearned from6 sentences. A preference can be rigid.Logical formLearned from6 sentences. A community can be rigid.Logical formLearned from6 sentences. A church can be rigid.Logical formLearned from6 sentences.