An observation can be plain.Logical formLearned from10 sentences. A sheep can be plain.Logical formLearned from10 sentences. (X-ray films) can be plain.Logical formLearned from10 sentences. A fence can be plain.Logical formLearned from10 sentences. Bowls can be plain.Logical formLearned from10 sentences. A (table salt) can be plain.Logical formLearned from10 sentences. A (horse sense) can be plain.Logical formLearned from10 sentences. Plain words may pertain-to a law.Logical formLearned from10 sentences. Furnishings can be plain.Logical formLearned from10 sentences. Flavors can be plain.Logical formLearned from10 sentences. A woman can be plain.Logical formLearned from10 sentences. Elements can be plain.Logical formLearned from10 sentences. (Telephone lines) can be plain.Logical formLearned from10 sentences. A cheating can be plain.Logical formLearned from10 sentences. A menu can be plain.Logical formLearned from10 sentences.