@Antedeluvian: Yesterday I got asked by a customer if a fuse was rated at 240V, 2A, would it change the ratings to 4A at 120V.
I had a sort of related "brain fart" the other day when I was calculating the power for a bunch of LEDs for a display -- when I added in the other stuff it all came to about 20A and I had a moment of panic thinking: "But my household sockets are only rated for 15A"
Then I came to my senses and realized that that's 15A at 120V -- while I needed 20A at 5V -- maybe I'm getting old (although I prefer to think of it as "maturing like a fine cheese" :-)
Also reminds me of a specification for a power supply that I was reviewing for the aeros[pace industry. It specified that voltage to be V volts and a current to be I amps and a power output of P watts. And P bore no resemblance to V*I
I would argue that Gradin's law is even more applicable to groups of people who are not engineers. that 's the "touchy-feely" kind of people who actually take people's reactions into account. When that happens, nothing gets done. The total IQ is exponentially more negative than with engineers. Why? Because with engineers, there is atleast some logic involved.