Unanswered questions can be interesting.Logical formLearned from8 sentences. (Policy questions) can be unanswered.Logical formLearned from8 sentences. Questions may be left unanswered.Logical formLearned from8 sentences. An email may go unanswered.Logical formLearned from8 sentences. A challenge may go unanswered.Logical formLearned from8 sentences. Puzzles can be unanswered.Logical formLearned from8 sentences. A telephone can be unanswered.Logical formLearned from8 sentences. Messages may go unanswered.Logical formLearned from8 sentences. Allegations can be unanswered.Logical formLearned from8 sentences. Answers can be to unanswered questions.Logical formLearned from8 sentences. Some issues may remain unanswered.Logical formLearned from8 sentences. Many questions can be unanswered.Logical formLearned from8 sentences. Calls to a church may go unanswered.Logical formLearned from8 sentences. An attack may remain unanswered.Logical formLearned from8 sentences. Calls to a security-bureau may ring unanswered.Logical formLearned from8 sentences.