An argument may be challenged.Logical formLearned from12 sentences. An agency may be challenged.Logical formLearned from12 sentences. A presumption may be challenged.Logical formLearned from12 sentences. Rights may be challenged.Logical formLearned from12 sentences. Darling may be challenged.Logical formLearned from12 sentences. A law may be challenged in courts.Logical formLearned from12 sentences. Prejudices may be challenged.Logical formLearned from12 sentences. A russian military may challenge a (cease-fire agreement).Logical formLearned from12 sentences. A friend may challenge a person.Logical formLearned from12 sentences. A female may challenge leaders.Logical formLearned from12 sentences. A deity may be challenged.Logical formLearned from12 sentences. A person may challenge ideas.Logical formLearned from12 sentences. An one may challenge results.Logical formLearned from12 sentences. A (privacy advocate) may challenge a law.Logical formLearned from12 sentences. Research may challenge an idea.Logical formLearned from12 sentences.