This was kinda overstated though. It really only works when you already have a dataset of that specific type on that specific keyboard. It’s not gonna just work on anyone.
These numbers are put on by grocery clerks with a price-gun. All they did was add on however many days the product is supposed to last after it got put on the shelf. So it’s really just some grocery worker not worrying about a date not existing. I woulda done the same thing if I was stocking these tbh.