I was confused too and still am. But the core ML course in my CS department gave a list of other "related courses" at the end of the course. Despite the fact th

I was confused too and still am. But the core ML course in my CS department gave a list of other "related courses" at the end of the course. Despite the fact that our Stats department has umpteen learning-related courses, not one of the courses on that list was in Stats. In my experience the "not talking" definitely originates from the ML side, although there's probably some of it in both directions. The first course in the Stats learning sequence had a tongue-in-cheek listing of differences between it and the CS learning course: http://www-stat.stanford.edu/~tibs/stat315a/glossary.pdf http://www-stat.stanford.edu/~tibs/stat315a/glossary.pdf