Errors inside our code usually fall into two groups.
There are those we are throwing to the caller function because we do not yet know how to handle it properly, or we are too lazy to implement proper recuperation from such a failure. For example, we might implement a function that reads files from a directory and returns an error if that fails. In such a case we might want to get a notification when the error occurs and do some actions to fix it.
After evaluating the problem, we might find out that the directory we're reading does not exist. Apart from the obvious fix to create the missing directory (immediate response), we should probably modify our code so that the directory is created as a result of receiving such an error. Even better, we should probably extend our code to check whether the directory exists before reading the files...
