Originally Posted by ItsJustMe

It's not that you can't calibrate the computer to be accurate overall. it's that the display is showing a precision that far outstrips the granularity of the measurement.

To take it to an extreme - Let's say you have the same display, showing 1/1000th of a mile, and it only clicks every 800 feet. Clearly the last few digits are completely useless, because they're basically never right.

Having a display to the 1/1000th mile is IMPLYING a precision that simply is not there. In the actual example, you see that it misses the 0.004 mile marker. Because it is trying to display a precision that is not supported by its measurement method, it displays 0.003 past the point where it SHOULD be saying 0.004 and never shows it, skipping straight to 0.005

It's displaying pointless precision in other words. There's simply no point to having it there. You can't ever really know if that last digit is correct or not, so there's no point in showing it.