An unknown can be for persons.Logical formLearned from18 sentences. An unknown can be born.Logical formLearned from17 sentences. A (name unknown) can be personal.Logical formLearned from17 sentences. Unknowns may pertain-to a person.Logical formLearned from17 sentences. Faith can be in an unknown.Logical formLearned from16 sentences. Depths may pertain-to an unknown.Logical formLearned from16 sentences. A person may hate an unknown.Logical formLearned from16 sentences. A person may venture into an unknown.Logical formLearned from16 sentences. An unknown can be to a (theater audience).Logical formLearned from16 sentences. A fear can be an unknown.Logical formLearned from16 sentences. A world can be constituted-of-or-filled-with unknowns.Logical formLearned from16 sentences. A field can be constituted-of-or-filled-with some unknowns.Logical formLearned from16 sentences. Details can be constituted-of-or-filled-with (death unknown).Logical formLearned from15 sentences. An unknown can be a common knowledge.Logical formLearned from15 sentences. A person may remain unknown.Logical formLearned from15 sentences.