In short, Prof Mark is pointing out just how much we are becoming multi-tasking humans and how our workday is split up into numerous different activities.
It's a pretty interesting read if you're into that type of thing, and yes, we did just give you permission to try and split your Droid display wide open in a moment of frustration.
"What we're doing here in this immigration battle is testing our willingness to hold together as a nation or split apart into a lot of Balkanized pieces, " he said.