An (insulation board) can be rigid.Logical formLearned from4 sentences. An insole can be rigid.Logical formLearned from4 sentences. Pcbs can be rigid.Logical formLearned from4 sentences. A stool may be held rigid by tension.Logical formLearned from4 sentences. A military dictatorship can be rigid.Logical formLearned from4 sentences. A (time table) can be rigid.Logical formLearned from4 sentences. A day can be rigid.Logical formLearned from4 sentences. An act can be rigid.Logical formLearned from4 sentences. A carrier can be rigid.Logical formLearned from4 sentences. Networks can be rigid.Logical formLearned from4 sentences. A wrench can be rigid.Logical formLearned from4 sentences. A person may stay rigid.Logical formLearned from4 sentences. Suits can be rigid.Logical formLearned from4 sentences. Heels can be rigid.Logical formLearned from4 sentences. Questions can be rigid.Logical formLearned from4 sentences.