Saying console.log is a setter seems horrifically wrong, console.log abstracts out IO and doesn't necessarily mutate any state that is within the program. It le

Saying console.log is a setter seems horrifically wrong, console.log abstracts out IO and doesn't necessarily mutate any state that is within the program. It leaves the happy confines of the program's abstraction/memory model and puts data out into The Real World. That all said, within the model being established by the author, everything does make sense, eventually, and the difference between IO output functions and setters, for the sake of the abstractions that the author builds, is non-existent.