Lines may prove that something-is-the-case.Logical formLearned from6 sentences. An epic may prove that something-is-the-case.Logical formLearned from6 sentences. An outbreak of responsibility may prove more.Logical formLearned from6 sentences. A person may prove good.Logical formLearned from6 sentences. Private schools may prove territory.Logical formLearned from6 sentences. Threats may prove unfounded.Logical formLearned from6 sentences. Studies may be proven.Logical formLearned from6 sentences. A government may prove itself to persons.Logical formLearned from6 sentences. A state may have a burden of proving that something-is-the-case.Logical formLearned from6 sentences. (Peace treaties) may prove worthless.Logical formLearned from6 sentences. A road may prove longer.Logical formLearned from6 sentences. Books may prove entertaining.Logical formLearned from6 sentences. An (amnesty law) may prove an obstacle.Logical formLearned from6 sentences. A cost of enforcing control may prove high.Logical formLearned from6 sentences. Presence may prove effective.Logical formLearned from6 sentences.