A method may fail.Logical formLearned from27 sentences. (Traffic lights) may fail.Logical formLearned from27 sentences. An immune system may fail.Logical formLearned from27 sentences. A (birth control) may fail.Logical formLearned from27 sentences. Some bills may fail.Logical formLearned from27 sentences. Efforts may fail for some reasons.Logical formLearned from27 sentences. Lawsuits may fail.Logical formLearned from27 sentences. A system may be failed.Logical formLearned from27 sentences. Medications may fail.Logical formLearned from27 sentences. A claim may fail.Logical formLearned from27 sentences. Students may fail a course.Logical formLearned from27 sentences. A (drug war) may fail.Logical formLearned from27 sentences. A prediction may fail.Logical formLearned from27 sentences. A system may fail.Logical formLearned from27 sentences. An assumption may fail.Logical formLearned from27 sentences.