Mook cannot prove that Millenials voting for perhaps only the 2nd time would/would not have Cankled; or Berned Cankles, or whatever. That data is not clear yet.
Mook is, however, at least self-aware enough to have referenced this conundrum in a different interview -- that determining the parameters expressed above will require the requisite big-data deep-dive in 2017 (and I will be right there figuring out how to use the same data to Trump's advantage).
But the Amish data is clear, self-evident, without contradiction.
It will be far less possible to amass deep data in 2017 than it was this year.
Because now voters know refusing to accept calls or to answer polls stymied the propagandists. Before that approach was theoretical. Now it has born dividends.