Re: It's known in other industries as "Root cause analysis"
"Biro? Six months ago I started using my italic fountain pen for the first time since my 20's."
Wow! You can write? manually with a pen? That'll make it easy to send secret messages that no one else can intercept. The security services must be wondering what to do if that ever catches on. How will they monitor everyone?
(Asimov dropped this into a short story, many, many years ago. Two school kids who learn the ancient art of reading and writing to send each other "secret" messages)