The entire app can't be pure as we wouldn't observe any effects of its execution :) This post offers an interesting discussion on this subject: https://www.des

The entire app can't be pure as we wouldn't observe any effects of its execution :) This post offers an interesting discussion on this subject: https://www.destroyallsoftware.com/screencasts/catalog/functional-core-imperative-shell https://www.destroyallsoftware.com/screencasts/catalog/funct...