Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good introduction to serious philosophical ideas

I am a philosophy professor, and I am very grateful to John Perry for his dialogues. They are an excellent way to get introduced to different philosophical views. They are also very useful teaching tools. The reader who wants more can get to the texts that the discussion is based on (Augustine, Leibniz, Russell, etc.). Perry's dialogues are witty, accessible and easy to read. No technical jargon. For those who do not have the time or the motivation to read Leibniz' Theodicy but who want to think for themselves, this text is highly recommended.