The design of the book uses an example of recursion - and it's got people scratching their heads Our heads hurt - and it's nothing to do with algebra By Zahra Mulroy Social Audience Editor 12:18 ...

People’s reactions have been pretty entertaining. @andrewpfister I don’t think they cover the time travelers paradox until Algebra II — Corey Garnett (@CoreyGarnett) May 20, 2016 Advertisement ...