A caller can be anonymous.Logical formLearned from2 069 sentences. A letter can be anonymous.Logical formLearned from1 851 sentences. Alcoholics can be anonymous.Logical formLearned from1 743 sentences. A tip can be anonymous.Logical formLearned from1 600 sentences. A donor can be anonymous.Logical formLearned from1 580 sentences. A person can be anonymous.Logical formLearned from1 357 sentences. Comments can be anonymous.Logical formLearned from1 136 sentences. A reader can be anonymous.Logical formLearned from982 sentences. An official can be anonymous.Logical formLearned from928 sentences. A call can be anonymous.Logical formLearned from903 sentences. Letters can be anonymous.Logical formLearned from817 sentences. A (phone call) can be anonymous.Logical formLearned from681 sentences. Persons can be anonymous.Logical formLearned from679 sentences. Users can be anonymous.Logical formLearned from586 sentences. A comment can be anonymous.Logical formLearned from584 sentences.