Shackles can be rigid.Logical formLearned from3 sentences. (Command structures) can be rigid.Logical formLearned from3 sentences. A relationship can be rigid.Logical formLearned from3 sentences. Monotheists can be rigid.Logical formLearned from3 sentences. Activities can be rigid.Logical formLearned from3 sentences. Protocols can be rigid.Logical formLearned from3 sentences. Assemblies can be rigid.Logical formLearned from3 sentences. (Time requirements) can be rigid.Logical formLearned from3 sentences. A (beat cloth) can be rigid.Logical formLearned from3 sentences. A (lens hood) can be rigid.Logical formLearned from3 sentences. (Student classifications) can be rigid.Logical formLearned from3 sentences. A boundary can be rigid.Logical formLearned from3 sentences. A (database. ..) can be rigid.Logical formLearned from3 sentences. A discipline can be rigid.Logical formLearned from3 sentences. A school can be rigid.Logical formLearned from3 sentences.