A treaty may remain valid.Logical formLearned from4 sentences. Donations can be valid.Logical formLearned from4 sentences. An appointment can be valid.Logical formLearned from4 sentences. A substitution can be valid.Logical formLearned from4 sentences. A (parking permit) may be considered valid.Logical formLearned from4 sentences. A (borrowing card) can be valid.Logical formLearned from4 sentences. An inclusion can be valid.Logical formLearned from4 sentences. An (automobile driver) can be valid.Logical formLearned from4 sentences. A deed can be valid.Logical formLearned from4 sentences. Acts of a legislature can be valid.Logical formLearned from4 sentences. (Subject headings) can be valid.Logical formLearned from4 sentences. An experimental design can be valid.Logical formLearned from4 sentences. A conception can be valid.Logical formLearned from4 sentences. A (screening tool) can be valid.Logical formLearned from4 sentences. An exploration can be valid.Logical formLearned from4 sentences.