
See if you can spot the rivers that are totally impossible because of inadequate mountain placement. D'oh.
Playing around with the agda javascript backend, now. Like, my ears are popping from the sudden change of type-theory-pressure.
Trying to understand in general what kind of diagrammatic interactions between degree-three nodes actually read sensibly in the lambda calculus:
Not sure this is the simplest possible inverse (or even that it is correct) but it makes for a fun diagram: