Dear Reader, It’s a hot afternoon in May and I’m teaching a group of university students online. I’ve already been teaching them for a few months. Faces fill the screen but one square only has a patch of blue sky. After a few minutes the sky disappears and there’s now a face. Let’s call him John. “Great to have you back, John!” I smile. “What happened?” “Er, yeah, Miss, I got the time of the class mixed up and I’m still out on my boat but I’m almost home, now.” Give him credit, he does look...