Interesting read. Another use I have found for "yes" is separating terminal output. Since "clear" doesn't delete your terminal scrollback, it can be easy to scroll up and get confused of what you are looking at. I've noticed this is especially useful when compiling testing programs to separate build output with "yes" so that you're not hunting down compiler errors/warnings that you have already fixed :) you can even be descriptive with your yes call -- ie: "yes fixed x checking to see if y is still broken"