For years and years I thought the "heavy side" function was 1 on one side of the origin and 0 on the other. I also thought the "pointing" vector pointed in the direction the wave was travelling.
I always figured the function was named after his haircut
Nominal Determinism at its finest
Nominative determinism. There's also the pithy Latin phrase nomen omen.
Ooooh that's so much better. I'm gonna use that from now on. The speed at which you can communicate and the other can understand your statement is very important. I wonder what other common phrases have shorter versions