[quote=@whizzball1]
<Snipped quote by Webmaster>

Well I know [i]that[/i], but I don't remember how you explained the whole 1/3 = 0.333333... thing is an estimate.
[/quote]

The very fact that it continues forever proves that it's not exact. .3333... != 1/3 in the same way that 
(1/3 * 3 == 3/3 == 1) != (.33333... * 3 == .99999999...). By definition, .99999... != 1, as it is infinitesimally less than one, but to the degree that it is [i]essentially [/i]1. But no matter what point at, and how many digits out you go, .999999... isn't 1.