Battery life is probably the most dispensable factor as many monitors can both plug-in and function independently by battery.
Similarly forms of thinking, the law of contradiction not excepted, have their meaning only in reference to determinate content, even though distributively all determinate contents are dispensable.
Pro-actively, the East Timorese have been an inconvenient and entirely dispensable commodity for the last twenty five years.
That said, there are some technologies available today that make a notebook dispensable.
Some places were considered dispensable, while others were regarded as indispensable to the nation-building drive.