It is an interesting book, but as far as I know no one has verified Everett's work. I've just noticed this article that talks about it: https://news.mit.edu/201

It is an interesting book, but as far as I know no one has verified Everett's work. I've just noticed this article that talks about it: https://news.mit.edu/2016/data-amazonian-piraha-language-debate-0309 https://news.mit.edu/2016/data-amazonian-piraha-language-deb...