If the dinosaur propagated using the egg, and over many generations evolved into the chicken, then the egg came before the chicken.
Context
Improvisation is not an exercise
“We know that improvisation is one of the canonical exercises of universal teaching.” – J. Rancière
While I do agree that teaching, whatever the subject, involves a healthy measure of improvising. I would, however, say that improvisation is not an exercise, but a temporal relationship that can be exercised during a given exercise.