By Luca Passani, WURFL Inventor & CTO at ScientiaMobile In the previous episodes: in 2010, a guy named Ethan Marcotte discovered Responsive Web Design (RWD) , i.e. the skillful use of conditional CSS (Media Queries) to make a fully-fledged website turn itself into a column on smartphones and other devices. Since then, Device Detection (disparagingly called "user-agent sniffing" by RWD aficionados) has been the thing you are not supposed to do, if you don't want to be discrimin...