A person may prove skills.Logical formLearned from21 sentences. A philosopher may prove that something-is-the-case.Logical formLearned from21 sentences. An author may prove that something-is-the-case.Logical formLearned from21 sentences. An administration may prove that something-is-the-case.Logical formLearned from21 sentences. A male may prove invaluable.Logical formLearned from21 sentences. Conservatives may prove adept at thinking.Logical formLearned from21 sentences. A picture may prove that something-is-the-case.Logical formLearned from21 sentences. An ability may prove that something-is-the-case.Logical formLearned from21 sentences. Images may prove that something-is-the-case.Logical formLearned from21 sentences. Negotiations may prove successful.Logical formLearned from21 sentences. Persons may prove worth.Logical formLearned from21 sentences. A weekend may prove that something-is-the-case.Logical formLearned from21 sentences. A concept may prove successful.Logical formLearned from21 sentences. A technology may prove useful.Logical formLearned from21 sentences. A male may prove ineffective.Logical formLearned from21 sentences.