Given the question: Given the following passage  "Much of the material in the Canon is not specifically "Theravadin", but is instead the collection of teachings that this school preserved from the early, non-sectarian body of teachings. According to Peter Harvey, it contains material at odds with later Theravadin orthodoxy. He states: "The Theravadins, then, may have added texts to the Canon for some time, but they do not appear to have tampered with what they already had from an earlier period."",  answer the following question. Note that the answer is present within the text.  Question: Academics are at odds regarding the precise dates of various strata of the __
The answer is:
Canon