A sample may prove positive.Logical formLearned from15 sentences. A mistake may prove costly.Logical formLearned from15 sentences. A junta may prove impervious to pressure.Logical formLearned from15 sentences. A carrier may prove that something-is-the-case.Logical formLearned from15 sentences. A report may be proven false.Logical formLearned from15 sentences. A course may prove successful.Logical formLearned from15 sentences. An autopsy may prove inconclusive.Logical formLearned from15 sentences. Reports may prove incorrect.Logical formLearned from15 sentences. An action may prove a resolve.Logical formLearned from15 sentences. An investigation may prove inconclusive.Logical formLearned from15 sentences. A female may prove strong.Logical formLearned from15 sentences. A fault may prove costly.Logical formLearned from15 sentences. Experience may prove invaluable.Logical formLearned from15 sentences. An issue may prove divisive.Logical formLearned from15 sentences. A person may prove a bravery.Logical formLearned from15 sentences.