A covenant can be valid.Logical formLearned from3 sentences. A supposition can be valid.Logical formLearned from3 sentences. An (appointment confirmation number) can be valid.Logical formLearned from3 sentences. (Arithmetic rules) can be valid.Logical formLearned from3 sentences. An acquisition can be valid.Logical formLearned from3 sentences. A situation can be valid.Logical formLearned from3 sentences. (Itu-t recommendations) can be valid.Logical formLearned from3 sentences. Some interpretation can be valid.Logical formLearned from3 sentences. Amounts can be valid.Logical formLearned from3 sentences. Construction can be valid.Logical formLearned from3 sentences. Purchases can be valid.Logical formLearned from3 sentences. Ulaw can be valid.Logical formLearned from3 sentences. A certificate may be considered valid.Logical formLearned from3 sentences. (Recipient headers) can be valid.Logical formLearned from3 sentences. A (color specification) can be valid.Logical formLearned from3 sentences.