How can the library know that the cash machine will communicate with the bank, or that there even is a cash machine? The library should just tell the program t

How can the library know that the cash machine will communicate with the bank, or that there even is a cash machine? The library should just tell the program that it failed go perform its task, not guess at what its parent program could, should or would do. Note that the discussion started from "abort". Maybe the authors meant something else by abort, but in a system programming context it means calling abort and terminating the program's execution immediately. If they just meant it as a synonym for panic, we're just having a nice discussion here.