Some Math for You.

use .333 as an abbreviation for .333333333333333333333333 (I tried to go a full screen of threes, but the screen would be huge...)

the idea, though, it that .333 to infinity plus .333 to infinity plus .333 to infinity equals .999 to infinity never yielding 1. But 1/3 + 1/3 + 1/3 does.