This takes advantage of the well known psychological fact that the more features that distinguish A from B, the easier it is to recall them individually.
The real test is, if you're away from your computer and think of a particular Brain Thought, can you form a mental picture of the plex and which other Thoughts hang off it? This is why Expanded view works better here than Normal View, since the spatial positions of the Thoughts can be made unique to each expanded view and stay that way.
It should be easy for them to tie a particular view to a particular background, wallpaper or theme. Particularly if you're using PB to cram for an exam, you want to make each saved view as different from the others as possible to help you remember it better.
I wish PB could make more use of sound as well as sight, e.g., play a sound file when hovering over a particular thought, as long as that doesn't drive you mad.
"Stoiker" is what we call Stoics, right?