A (system design) can be rigorous.Logical formLearned from2 sentences. (Compliance requirements) can be rigorous.Logical formLearned from2 sentences. A (scrutiny standard) can be rigorous.Logical formLearned from2 sentences. A (scrutiny test) can be rigorous.Logical formLearned from2 sentences. (Education goals) can be rigorous.Logical formLearned from2 sentences. A (state subject test) can be rigorous.Logical formLearned from2 sentences. Specifications can be rigorous.Logical formLearned from2 sentences. Authorities may require rigorous proof.Logical formLearned from2 sentences. A (research proposal) can be rigorous.Logical formLearned from2 sentences. An exact science can be rigorous.Logical formLearned from2 sentences. (Business tasks) can be rigorous.Logical formLearned from2 sentences. (Compliance efforts) can be rigorous.Logical formLearned from2 sentences. A (qualification program) can be rigorous.Logical formLearned from2 sentences. A (college calculus course) can be rigorous.Logical formLearned from2 sentences. A (language instruction) can be rigorous.Logical formLearned from2 sentences.