Arrows can be hollow.Logical formLearned from6 sentences. A trashing can be hollow.Logical formLearned from6 sentences. (Management promises) of a turnaround may prove hollow.Logical formLearned from6 sentences. An equality can be hollow.Logical formLearned from6 sentences. Assurances may sound hollow.Logical formLearned from6 sentences. A symbol can be hollow.Logical formLearned from6 sentences. An atom can be hollow.Logical formLearned from6 sentences. An exercise may ring hollow.Logical formLearned from6 sentences. A nozzle can be hollow.Logical formLearned from6 sentences. Murmurs can be hollow.Logical formLearned from6 sentences. Triangles can be hollow.Logical formLearned from6 sentences. A drill can be hollow.Logical formLearned from6 sentences. Cries may ring hollow.Logical formLearned from6 sentences. A pastiche can be hollow.Logical formLearned from6 sentences. Threads can be hollow.Logical formLearned from6 sentences.