A substance can be extraterrestrial.Logical formLearned from3 sentences. A villain can be extraterrestrial.Logical formLearned from3 sentences. (Impact structures) can be extraterrestrial.Logical formLearned from3 sentences. A saucer can be extraterrestrial.Logical formLearned from3 sentences. Belief can be in extraterrestrial life.Logical formLearned from3 sentences. Communication can be with extraterrestrial intelligences.Logical formLearned from3 sentences. Weapons can be extraterrestrial.Logical formLearned from3 sentences. A proponent may pertain-to an extraterrestrial hypothesis.Logical formLearned from3 sentences. A microbe can be extraterrestrial.Logical formLearned from3 sentences. An universe can be extraterrestrial.Logical formLearned from3 sentences. A contradiction can be between estimates of a probability of an existence of extraterrestrial civilizations.Logical formLearned from3 sentences. Extraterrestrial civilizations can be detectable.Logical formLearned from3 sentences. An iridium can be extraterrestrial.Logical formLearned from3 sentences. A (life debate) can be extraterrestrial.Logical formLearned from3 sentences. A solar spectrum can be extraterrestrial.Logical formLearned from3 sentences.