As a science fiction fan, I had always assumed that when computers supplemented our intelligence, it would be because we outsourced some of our memory to them. We would ask questions, and our machines would give oracular - or supremely practical - replies.

In the case of Apple, they did originally do production internally, but then along came unbelievably good outsourced manufacturing from companies like Foxconn. We don't have that in the rocket business. There's no Foxconn in the rocket business.

We've outsourced our memories to digital devices and the result is that we no longer trust our memories. We see every small forgotten thing as evidence that they're failing us.