Are you feeling good sport today?

If yes: use your brains and find out for yourself what & why (it's a typical 'parsing' mistake programmers make; but I'm sure you'll be able to 'discover it by yourself' and slap yourself on the forehead for it)
If no:
Spoiler Alert, click show to read: 
You forgot to take into account that comments mentioning this specific attribute may occur inside the EDU. I know of at least 1 such instance, but there are possibly more. Hence, it follows your estimate cannot be considered any more accurate than the few I've posted before.