Are the 1430s the most likely date range for the Zodiac drawings?

[R. Sale]

When there is more than one valid way to analyze the data, then the data should be analyzed in more than one way. When the investigator chooses one method and omits others, that has the potential to skew the analysis to a more limited outcome. Analysis based on the number of extant mss will give one result. Analysis based on the known sources of relevant mss production will give a different result. Knowing both is more helpful than just knowing either one - without the other.