/prog/rammer here, need urgent help

hello /sci/, long time no see
There is currently a troll on /prog/, and would greatly appreciate your help.

Basically, the troll is trying to prove that 0.999~ =/= 1
Here are some of his arguments
http://stormtower.invisionplus.net/?mforum=stormtower&showtopic=97

I'm wondering if the maths genius' on this board can rip him apart? Thank you

>>8
Seriously, us programmers are required to be flexible, constantly learning new technologies and paradigms. We invent stuff. What do you do? Learn equations and theorems WORTHY mathematicians invented, then drop out and take up Psychology or Political Science. Hahaha, here's a nickel kid (referring to >>7) go tell someone who cares.