(Evaluation systems) can be rigorous.Logical formLearned from6 sentences. A (training cycle) can be rigorous.Logical formLearned from6 sentences. A physical exercise can be rigorous.Logical formLearned from6 sentences. A confrontation can be rigorous.Logical formLearned from6 sentences. An (education system) can be rigorous.Logical formLearned from6 sentences. A (work practice) can be rigorous.Logical formLearned from6 sentences. Controlled trials can be rigorous.Logical formLearned from6 sentences. A (quality control program) can be rigorous.Logical formLearned from6 sentences. Deductions can be rigorous.Logical formLearned from6 sentences. A seminar can be rigorous.Logical formLearned from6 sentences. A feedback can be rigorous.Logical formLearned from6 sentences. A (market research) can be rigorous.Logical formLearned from6 sentences. (Performance assessments) can be rigorous.Logical formLearned from6 sentences. An (osha evaluation) can be rigorous.Logical formLearned from6 sentences. Liberal arts can be rigorous.Logical formLearned from6 sentences.