I wonder about this a lot.<p>File systems are arranged hierarchically. Fluke of development? Library catalogues are organised hierarchically. Lucky coincidence?
Books themselves are laid out hierarchically. I see a pattern emerging, but is it a trick of the light?<p>Seems like we like to chunk and splay amorphous informational units into graph-like rooted structures. Maybe cuz of its flexibility?<p>For something we use all the time and something we do all the time language-use and conceptualisation are deeply mysterious.