Apple knowingly injected the Siri engine with more attitude when it began refining it for the iPhone 4S, an engineer for the project gave out on Saturday. While Siri's co-founder and former worker Norman Winarsky's team gave it a "light attitude," the WSJ heard from its insider that the company wanted "edge," even if the core of the engine was "friendly and humble." That includes both turning down offers of marriage, answering why it's awesome, and responding to requests for hiding a body or having sex with clearly self-aware location-based results.