A restriction can be rigid.Logical formLearned from4 sentences. A strap can be rigid.Logical formLearned from4 sentences. A background can be rigid.Logical formLearned from4 sentences. Preconceptions can be rigid.Logical formLearned from4 sentences. A (base slab) can be rigid.Logical formLearned from4 sentences. Rigid motions may pertain-to a plane.Logical formLearned from4 sentences. Sets can be constituted-of-or-filled-with rigid bodies.Logical formLearned from4 sentences. Roles can be rigid.Logical formLearned from4 sentences. Examples can be rigid.Logical formLearned from4 sentences. A conditioning can be rigid.Logical formLearned from4 sentences. A toe can be rigid.Logical formLearned from4 sentences. Timings can be rigid.Logical formLearned from4 sentences. A hawk can be rigid.Logical formLearned from4 sentences. A keel can be rigid.Logical formLearned from4 sentences. Phenylethylamines can be rigid.Logical formLearned from4 sentences.