Unfortunately, I think some of that section is needed to explain what is the nature of the problem that's being addressed (i.e. brain tending to do depth-first search). That said, the two sentences about a likely neuroscience story probably should go. I was actually pretty tempted to take them out when posting but somehow talked myself out of it. I'll go do that now. Hopefully it's not considered bad form to edit without leaving a note?

Thanks for the helpful comment, by the way.