Mathematics is a suspicious activity. All those hypotenuse drawings must be plans for assassination attempts. Algebra is treacherous code. When did you ever meet a student of infinitesimal calculus who didn't harbour rabid ambitions to rule the world? And anyone who tells you Archimedes was killed at the capture of Syracuse by a soldier who didn't know who he was, is ignorant of how military forces work. There will have been a secret order: man making diagrams in the dust equals number one target.