A roster can be valid.Logical formLearned from4 sentences. A department can be valid.Logical formLearned from4 sentences. A (research design) can be valid.Logical formLearned from4 sentences. Ordination can be valid.Logical formLearned from4 sentences. Evidence can be valid.Logical formLearned from4 sentences. Exemptions can be valid.Logical formLearned from4 sentences. Interventions can be valid.Logical formLearned from4 sentences. Roads can be valid.Logical formLearned from4 sentences. A (planning consent) can be valid.Logical formLearned from4 sentences. An identifier can be valid.Logical formLearned from4 sentences. A moral reason can be valid.Logical formLearned from4 sentences. A voucher can be valid for an exam.Logical formLearned from4 sentences. A gift can be valid.Logical formLearned from4 sentences. Conservation of energy can be valid.Logical formLearned from4 sentences. A document may remain valid.Logical formLearned from4 sentences.