> One of them is doing something wrong, or at least something that needs changed. Which one? While this is as true in FP as it is anywhere, my experience is th

> One of them is doing something wrong, or at least something that needs changed. Which one? While this is as true in FP as it is anywhere, my experience is that it’s rarely true of the kind of small pure functions that tend to be composed like this. When someone is using a chain of functions like this, they usually are good abstractions that don’t change, and are short enough to be trivially correct.