Do you remember life before the internet? Before hashtags, websites and even email? Before information overload and the ever-shortening of attention spans? If you do, you're part of the last generation of humans to recall the predigital world. Do you miss it?
Such philosophical questions in these technology-dominated times are the subject of The End of Absence: Reclaiming What We've Lost in a World of Constant Connection. Its author, Canadian journalist Michael Harris, divides up the world's population into two distinctive communities; those who remember the world before the internet - the last ever to do so - and those that know nothing else.
By pitting "digital immigrants" against "digital natives", Harris is underlining a much-used phrase - "the information age" - but also charting how long it's been since that epoch begun.
"Soon enough nobody will remember life before the internet," he writes.
"Our online technologies will have become a kind of foundational myth - a story people are barely conscious of, something natural and, therefore, unnoticed."