A strength can be rigid.Logical formLearned from7 sentences. A (party line) can be rigid.Logical formLearned from7 sentences. (Foam boards) can be rigid.Logical formLearned from7 sentences. A (state system) can be rigid.Logical formLearned from7 sentences. Parents can be rigid.Logical formLearned from7 sentences. (Spending limits) can be rigid.Logical formLearned from7 sentences. (Referendum campaign spending laws) can be rigid.Logical formLearned from7 sentences. (Litmus tests) can be rigid.Logical formLearned from7 sentences. A (plastic case) can be rigid.Logical formLearned from7 sentences. Pride can be rigid.Logical formLearned from7 sentences. A curriculum can be rigid.Logical formLearned from7 sentences. (Power structures) can be rigid.Logical formLearned from7 sentences. A constraint can be rigid.Logical formLearned from7 sentences. A portion can be rigid.Logical formLearned from7 sentences. A truth can be rigid.Logical formLearned from7 sentences.