Because I realised thinking like this is not obvious to Clojure newcomers, especially those having non-FP first languages. Because I was there too, all those moons ago! Feat. a salty footnote about the misdirected rancour popularly heaped upon CSS (yes, Cascading Style Sheets), triggered by that fact that 'comp' is a combinator, and I think they should have called it Combinatory Styling System.