A ship can be hollow.Logical formLearned from29 sentences. A philosophy can be hollow.Logical formLearned from29 sentences. A cathode can be hollow.Logical formLearned from29 sentences. Parts can be hollow.Logical formLearned from29 sentences. A wood can be hollow.Logical formLearned from29 sentences. A void can be hollow.Logical formLearned from29 sentences. Squares can be hollow.Logical formLearned from29 sentences. Fangs can be hollow.Logical formLearned from29 sentences. A portion can be hollow.Logical formLearned from29 sentences. Assurances can be hollow.Logical formLearned from29 sentences. Heads can be hollow.Logical formLearned from28 sentences. An argument can be hollow.Logical formLearned from28 sentences. Particles can be hollow.Logical formLearned from28 sentences. A claim may ring hollow.Logical formLearned from28 sentences. Centers can be hollow.Logical formLearned from27 sentences.