This is really good advice. There are a ton of different reasons why you can end up breaking this rule and almost all of them are things you want to avoid: mult

This is really good advice. There are a ton of different reasons why you can end up breaking this rule and almost all of them are things you want to avoid: multi-purpose functions, adding to old functions that should be refactored, adding an extra case to an if statement that should be broken down, etc.