Polls may prove inaccurate.Logical formLearned from9 sentences. A child may prove that something-is-the-case.Logical formLearned from9 sentences. A coalition may prove stable.Logical formLearned from9 sentences. An assertion may prove false.Logical formLearned from9 sentences. Ultrasound may prove better.Logical formLearned from9 sentences. Problems may prove difficult.Logical formLearned from9 sentences. A person may prove a claim.Logical formLearned from9 sentences. Votes may prove crucial.Logical formLearned from9 sentences. A person may prove a lot.Logical formLearned from9 sentences. A misses may prove costly.Logical formLearned from9 sentences. Some study may prove that something-is-the-case.Logical formLearned from9 sentences. Medical evidence may prove that something-is-the-case.Logical formLearned from9 sentences. A (landslide victory) may prove that something-is-the-case.Logical formLearned from9 sentences. A move may prove unpopular.Logical formLearned from9 sentences. Evidence may prove crimes.Logical formLearned from9 sentences.