Where I come from, P and (not P) == complete crap. [The C/C++ language has forever ruined the "=" symbol; a single "=" in a C/C++ expression is either a bug or an obfuscated code winner (which used to get you a job at Microsoft); only "==" is safe from side-effects.] http://blogs.wsj.com/economics/2015/08/17/qa-paul-romer-on-mathiness-and-the... Paul Romer: "Gene Fama at University of Chicago got [the Nobel Prize in Economics] for the efficient markets hypothesis. Robert Shiller from Yale got [the Nobel Prize in Economics] for his view that these markets are not efficient"