An accomplishment can be hollow.Logical formLearned from4 sentences. Advice can be hollow.Logical formLearned from4 sentences. A tool can be hollow.Logical formLearned from4 sentences. Excitement may ring hollow.Logical formLearned from4 sentences. An optimism can be hollow.Logical formLearned from4 sentences. A pledge can be hollow.Logical formLearned from4 sentences. A fellow can be hollow.Logical formLearned from4 sentences. (Brick walls) can be hollow.Logical formLearned from4 sentences. Pronouncements can be hollow.Logical formLearned from4 sentences. Commitments can be hollow.Logical formLearned from4 sentences. A statement may ring hollow.Logical formLearned from4 sentences. Ornaments can be hollow.Logical formLearned from4 sentences. A boast can be hollow.Logical formLearned from4 sentences. Teeth can be hollow.Logical formLearned from4 sentences. Concerns may ring hollow.Logical formLearned from4 sentences.