I'm not sure that there's much of a central thread to this book, and if there is it certainly isn't the "this is why math is useful" business offered in the first chapter. As for not being wrong, Ellenberg explains statistical math's claims to underpin the scientific method well enough to put its flaws and vulnerabilities in sharp relief. But that's OK, he's an engaging writer with lots of interesting things to say about the mathematics of statistics and probability and its application to everything up to and including theology. And who wouldn't be interested in that?