Documents can be valid.Logical formLearned from67 sentences. A (photo identification) can be valid.Logical formLearned from66 sentences. A (return address) can be valid.Logical formLearned from66 sentences. Purposes can be valid.Logical formLearned from66 sentences. Patents can be valid.Logical formLearned from66 sentences. A plan can be valid.Logical formLearned from66 sentences. A topic can be valid.Logical formLearned from65 sentences. Data can be valid.Logical formLearned from65 sentences. A reasoning can be valid.Logical formLearned from65 sentences. Credentials can be valid.Logical formLearned from65 sentences. A markup can be valid.Logical formLearned from65 sentences. A formula can be valid.Logical formLearned from65 sentences. A lease can be valid.Logical formLearned from65 sentences. Combinations can be valid.Logical formLearned from65 sentences. A place can be valid.Logical formLearned from64 sentences.