I've always enjoyed Scott Adams' 'Dilbert' cartoons. So, I was quite happy to find an Android application called "Fast Dilbert Reader" for my phone. FDR gives you access to all 22 years of Dilbert cartoons and, I am afraid, that my addiction is such that I started to read from somewhere back in 1989.
When teaching adults, I often used to tell them that there was no such thing as a 'stupid question' and that they should ask if there was anything they didn't understand. This Dilbert from November 1989 made me smile: