Let's think step by step! Pick which sentence is not logical.\nOptions:\n- Sentence A: "Knife is an instrument composed of a blade fixed into a handle, used for cutting"\n- Sentence B: "Pen is an instrument composed of a blade fixed into a handle, used for cutting"\n

User
A pen is used used for writing (not cutting), and the handle is filled with ink (not a blade). The answer: Sentence B.
Assistant