A statement may be proven.Logical formLearned from18 sentences. Some attempts may prove fruitless.Logical formLearned from18 sentences. A forecast may prove optimistic.Logical formLearned from18 sentences. A vaccine may prove effective.Logical formLearned from18 sentences. Fraud may be proven.Logical formLearned from18 sentences. A female may prove to herself that something-is-the-case.Logical formLearned from18 sentences. (Movie clips) may prove that something-is-the-case.Logical formLearned from18 sentences. Traffic may prove an advantage.Logical formLearned from18 sentences. A survey may prove that something-is-the-case.Logical formLearned from18 sentences. A technology may prove successful.Logical formLearned from18 sentences. (Laser graffiti) may prove lab.Logical formLearned from18 sentences. A fact may prove to a person that something-is-the-case.Logical formLearned from18 sentences. A male may prove everyone.Logical formLearned from18 sentences. An authenticity may be proven.Logical formLearned from18 sentences. A person may prove to everyone that something-is-the-case.Logical formLearned from18 sentences.