Okay, imagine you&#x27;re working on the hardware of the engine. Pistons, bolts, lubrication. One Friday afternoon you leave work depressed because the emissions suck, they&#x27;ve sucked for months, and they won&#x27;t get better without a major redesign.<p>On Monday morning, the emissions tests are suddenly passing.<p>&quot;Ha, just one of those things,&quot; you say, &quot;I thought we had emissions problems, but I guess we don&#x27;t after all. Let&#x27;s ship the engine and have a party!&quot;<p>There is no way that this happened.