this is why i made http://goingtorain.com years ago because i rarely care what the exact temperature is going to be, just whether it's going to rain.

similarly, i made a clock called pixelclock (http://jcs.org/notaweblog/2005/06/28/pixelclock/) because all i cared about at work was whether it was time for lunch or time to go home.

sometimes things are better left vague.