It is. It's also one where you don't need to remember context. Bret Victor describes and demos this in his presentation "Inventing on Principle." [http://vimeo

It is. It's also one where you don't need to remember context. Bret Victor describes and demos this in his presentation "Inventing on Principle." [http://vimeo.com/36579366 http://vimeo.com/36579366]. BCX is better than a page-based back button. By the way, back still works.