(Log pipes) can be hollow.Logical formLearned from2 sentences. Concerns may sound hollow.Logical formLearned from2 sentences. A hypocrisy can be hollow.Logical formLearned from2 sentences. Assurances can be hollow.Logical formLearned from2 sentences. Pretensions to self-government can be hollow.Logical formLearned from2 sentences. (Brick blocks) can be hollow.Logical formLearned from2 sentences. A doughnut can be hollow.Logical formLearned from2 sentences. A (flower stalk) can be hollow.Logical formLearned from2 sentences. (Flower stalks) can be hollow.Logical formLearned from2 sentences. Trees can be hollow.Logical formLearned from2 sentences. A threat may ring hollow.Logical formLearned from2 sentences. (Bamboo shoots) can be hollow.Logical formLearned from2 sentences. A (viewing experience) can be hollow.Logical formLearned from2 sentences. A rhythm can be hollow.Logical formLearned from2 sentences. A grandstanding can be hollow.Logical formLearned from2 sentences.