This is in a sense what the clojure.spec work would allow -- dev time exceptions when you violate a function's contract that have no impact on production speed.

This is in a sense what the clojure.spec work would allow -- dev time exceptions when you violate a function's contract that have no impact on production speed. For some reason the blog's author dismisses spec as irrelevant greenfield development, when it would quite neatly solve many of his complaints