Here’s a thought experiment: where do you end? Not your body, but you, the nebulous identity you think of as your “self”. Does it end at the limits of your physical form? Or does it include your voice, which can now be heard as far as outer space; your personal and behavioral data, which is spread out across the impossibly broad plane known as digital space; and your active online personas, which probably encompass dozens of different social media networks, text message conversations, and email exchanges?
This is a question with no clear answer, and, as the smartphone grows ever more essential to our daily lives, that border’s only getting blurrier.