A president may prove that something-is-the-case.Logical formLearned from26 sentences. A country may prove to the world that something-is-the-case.Logical formLearned from26 sentences. A system may prove effective.Logical formLearned from26 sentences. A country may prove opponents.Logical formLearned from26 sentences. A male may prove good.Logical formLearned from25 sentences. A result may be proven.Logical formLearned from25 sentences. An attempt may prove successful.Logical formLearned from25 sentences. Rumors may prove true.Logical formLearned from25 sentences. Testimony may prove that something-is-the-case.Logical formLearned from25 sentences. A female may prove a person.Logical formLearned from25 sentences. A website may prove that something-is-the-case.Logical formLearned from25 sentences. A method may prove effective.Logical formLearned from25 sentences. Research may prove that something-is-the-case.Logical formLearned from25 sentences. A plan may prove that something-is-the-case.Logical formLearned from25 sentences. A male may prove a conjecture.Logical formLearned from25 sentences.