Computers are becoming a big environmental threat. They are using more energy than air traffic. - Joe Armstrong

The inability to isolate software components from each other is the main reason why many popular programming languages cannot be used for making robust system software. (page 32)

The cornerstones of fault tolerant programming are to isolate errors to make sure if one thing crash it does not crash anything else. That's what the processes in operating system do.

Instead of handy compose, we'll keep compose exactly the same and will write a little function which takes a function that does not have debugging and return the function that does debugging. And we have a function that accept only one argument, the un-debugging version, we'll add another little function that automatically add an argument to it. When we done that, we can bind call compose on it and everything will work and will be nice. And will be peace on the earth and everybody will have a good time.