A noise can be formidable.Logical formLearned from3 sentences. (Web filters) can be formidable.Logical formLearned from3 sentences. A home-ice advantage can be formidable.Logical formLearned from3 sentences. A defense can be formidable.Logical formLearned from3 sentences. A (re-election challenge) can be formidable.Logical formLearned from3 sentences. Violence can be formidable.Logical formLearned from3 sentences. Packs can be formidable.Logical formLearned from3 sentences. An alliance of some sort can be formidable.Logical formLearned from3 sentences. A (comeback challenge) can be formidable.Logical formLearned from3 sentences. Owners can be formidable.Logical formLearned from3 sentences. A mafia can be formidable.Logical formLearned from3 sentences. A past can be formidable.Logical formLearned from3 sentences. Tasks can be formidable.Logical formLearned from3 sentences. Debaters can be formidable.Logical formLearned from3 sentences. Unions can be formidable.Logical formLearned from3 sentences.