Yes, there are this and myriad other schemes to accomplish the same thing. This doesn't much help the average customer service worker who struggles to give cor

Yes, there are this and myriad other schemes to accomplish the same thing. This doesn't much help the average customer service worker who struggles to give correct change if you hand them cash in an amount that's not a round number. Passwords are a thing that need to work for everyone, which means they need to work for the lowest common denominator too, which means the GP is correct to point out that password advice is contradictory: the lowest common denominator cannot both use strong, unique passwords and avoid using some other kind of technology to assist with that.