Debugging Lotus 1-2-3 by fax

There isn't a lot to this story beyond the fact that in around 1990 I helped debug someone's Lotus 1-2-3 set up via fax. But it's a good reminder of how important the Zeroth Law of Debugging is (see below). Without some sort of online connection with these folks, and with transatlantic phone calls being very, very expensive (I was in the UK, they were in the US) fax was the obvious answer. I was…