You&#x27;re right that there is no perfect heuristic, but Google Glass wad real and real stuff was done.<p>If you&#x27;ve ever been near or caught up in the whirlwind of one of these hustle jobs, it&#x27;s obvious and unmistakable that nothing is &quot;actually happening.&quot; They&#x27;re not failed attempts to do something, but successful attempts to appear to be doing something. They&#x27;re cons.