

Could be that book 7 had to be printed on lighter-weight stock if the page count would have exceeded the capacity for the hard-cover binding. (They may not have anticipated that a later book would get that big when they chose the stock at the start of the series.)

















It’s important to distinguish between predictive models and explanatory models, and between local models and global models.
The title implies an issue with global explanatory models, but the article describes issues with local predictive models.