Profits may prove ephemeral in_the_face_of costs.Logical formLearned from10 sentences. A male may prove a handful.Logical formLearned from10 sentences. A male may prove a disappointment.Logical formLearned from10 sentences. An investment may prove fruitful.Logical formLearned from10 sentences. Talks may prove inconclusive.Logical formLearned from10 sentences. (Ground troops) may prove essential.Logical formLearned from10 sentences. A move may prove difficult.Logical formLearned from10 sentences. A (tv superstar) may prove likable.Logical formLearned from10 sentences. A message may prove long-lived.Logical formLearned from10 sentences. A theory may be proven correct.Logical formLearned from10 sentences. A dream may prove expensive.Logical formLearned from10 sentences. (Government documents) may prove that something-is-the-case.Logical formLearned from10 sentences. Pcs may prove expensive.Logical formLearned from10 sentences. Foreigners may prove a key to a success.Logical formLearned from10 sentences. Gangs may prove troublesome.Logical formLearned from10 sentences.