[rosser]

By analogy: I used to have incredible direction sense. On one of my cross-country drives, a couple decades ago, I made it to my friend's place, having only vaguely consulted at an atlas a couple of times. I lived in New York; she lived in San Diego. (Edit: And I'm specifically including having navigated the local highways and surface streets in that anecdote, not just which Interstates I used.)

Now, I get lost in my own city without using my phone's mapping app.

When we outsource our cognitive capabilities to the exocortex, we lose those capabilities. When we give our children a tool that obviates their need ever to develop those capabilities, we rob them of something essential.