But according to the article (and it's also pasted [here](http://news.ycombinator.com/item?id=2903166) http://news.ycombinator.com/item?id=2903166)), they've id

But according to the article (and it's also pasted [here](http://news.ycombinator.com/item?id=2903166) http://news.ycombinator.com/item?id=2903166)), they've identified something independent of experience and preparation.