hacker news links - sep 13 2015 https://news.ycombinator.com/item?id=10208075 https://news.ycombinator.com/item?id=10209775 https://news.ycombinator.com/item?id=10208861 https://news.ycombinator.com/item?id=10210321 https://news.ycombinator.com/item?id=10209456 https://news.ycombinator.com/item?id=10211693 https://news.ycombinator.com/item?id=10210171 https://news.ycombinator.com/item?id=10210776 https://blogs.uw.edu/ajko/2012/08/22/john-carmack-discusses-the-art-and-science-of-software-engineering/