Many languages allow for assignment and instantiation on the same statement... I deal with this all the time in ruby and my editor simply highlights vars which

Many languages allow for assignment and instantiation on the same statement... I deal with this all the time in ruby and my editor simply highlights vars which aren't used later (quickly leading me to figure out if I had a typo) As for your traffic example: in many circumstances removing lines and signs makes the roads safer (as reported by the guardian). People pay more attention because of increased uncertainty, and aren't driving (or coding) on autopilot. https://www.theguardian.com/commentisfree/2016/feb/04/removal-road-markings-safer-fewer-accidents-drivers https://www.theguardian.com/commentisfree/2016/feb/04/remova... Paying attention is precisely what we're paid to do.