Next Episode: NonEmpty

Subscriber-Only: Today's episode is available only to subscribers. If you are a Point-Free subscriber you can access your private podcast feed by visiting https://www.pointfree.co/account.

---

Let's explore a type of composition that defies our intuitions. It appears to go in the opposite direction than we are used to. We'll show that this composition is completely natural, hiding right in plain sight, and in fact related to the Liskov Substitution Principle.