I would rate myself high on spatial intelligence based on my love of solving puzzles, and anecdotally, my perfect score on that portion of military testing. Ho

I would rate myself high on spatial intelligence based on my love of solving puzzles, and anecdotally, my perfect score on that portion of military testing. However, I will admit that as I age, my interest in arbitrary puzzles has declined. I much more enjoy putting together puzzles of scenes or artwork I find attractive. Funny enough, I would say I used to do just as you describe - rearrange carloads of things or otherwise challenge myself for whatever reason to come in "under budget" on space and time. It's probably from sheer exhaustion that my drive for doing so diminished. Your closing thoughts inspired me to search for 'isomorphic projection'; that led me to find 'graph isomorphism' [1]. I have not dived deep into that particular page, but the image of Graph H is very interesting as it illustrates what I see in my head when trying to distill software. 1. https://en.wikipedia.org/wiki/Graph_isomorphism https://en.wikipedia.org/wiki/Graph_isomorphism