A practice may prove difficult.Logical formLearned from5 sentences. A (dna analysis) may prove a use of drugs.Logical formLearned from5 sentences. A workshop may prove that something-is-the-case.Logical formLearned from5 sentences. A push may prove successful.Logical formLearned from5 sentences. A person may have a burden of proving that something-is-the-case.Logical formLearned from5 sentences. A scheme may prove a success.Logical formLearned from5 sentences. A landlord may prove that something-is-the-case.Logical formLearned from5 sentences. A doctrine may prove contagious.Logical formLearned from5 sentences. Persons may prove an existence of a deity.Logical formLearned from5 sentences. A person may prove a man.Logical formLearned from5 sentences. A man may prove an own work.Logical formLearned from5 sentences. Efforts may prove a failure.Logical formLearned from5 sentences. Miracles may prove that something-is-the-case.Logical formLearned from5 sentences. An assumption may prove erroneous.Logical formLearned from5 sentences. Sacrifices may prove worthwhile.Logical formLearned from5 sentences.