A third party can be formidable.Logical formLearned from3 sentences. (Show-biz achievements) may remain formidable.Logical formLearned from3 sentences. A (fighting organization) can be formidable.Logical formLearned from3 sentences. A rolodex can be formidable.Logical formLearned from3 sentences. Doors can be formidable.Logical formLearned from3 sentences. Puzzles can be formidable.Logical formLearned from3 sentences. A (fund-raising machine) can be formidable.Logical formLearned from3 sentences. A (lobbying operation) can be formidable.Logical formLearned from3 sentences. Passes can be formidable.Logical formLearned from3 sentences. Dangers can be formidable.Logical formLearned from3 sentences. (Cocaine traffickers) can be formidable.Logical formLearned from3 sentences. An endowment can be formidable.Logical formLearned from3 sentences. Bureaucracies can be formidable.Logical formLearned from3 sentences. (Resource problems) can be formidable.Logical formLearned from3 sentences. Educational institutions can be formidable.Logical formLearned from3 sentences.