A dialectic can be formidable.Logical formLearned from1 sentences. Permanent fortifications can be formidable.Logical formLearned from1 sentences. A sortie can be formidable.Logical formLearned from1 sentences. A revolt can be formidable.Logical formLearned from1 sentences. A sort can be formidable.Logical formLearned from1 sentences. An epidemic can be formidable.Logical formLearned from1 sentences. A pilgrimage can be formidable.Logical formLearned from1 sentences. A zeriba can be formidable.Logical formLearned from1 sentences. Features of controversy can be formidable.Logical formLearned from1 sentences. A stinger can be formidable.Logical formLearned from1 sentences. A (sand bar) can be formidable.Logical formLearned from1 sentences. A succour can be formidable.Logical formLearned from1 sentences. A doctrine may be made formidable by a confederation of preachers.Logical formLearned from1 sentences. A nest can be formidable.Logical formLearned from1 sentences. Competitors can be formidable.Logical formLearned from1 sentences.