Hopes may prove vain.Logical formLearned from8 sentences. Displays can be vain.Logical formLearned from8 sentences. Wishes can be vain.Logical formLearned from8 sentences. Boastings can be vain.Logical formLearned from8 sentences. An excuse can be vain.Logical formLearned from8 sentences. An undertaking can be vain.Logical formLearned from8 sentences. Delusions can be vain.Logical formLearned from8 sentences. A swearing can be vain.Logical formLearned from8 sentences. An ostentation can be vain.Logical formLearned from8 sentences. Opinions can be vain.Logical formLearned from8 sentences. An attack can be vain.Logical formLearned from8 sentences. A worship can be vain.Logical formLearned from8 sentences. A joy can be vain.Logical formLearned from8 sentences. A denial can be vain.Logical formLearned from8 sentences. A bastard can be vain.Logical formLearned from8 sentences.