/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

Just as a little aside, for those who are interested, the troll from the OP is no other than FrozenVoid, who I believe /sci/ should know quite well.
http://dis.4chan.org/read/sci/1172747610
So technically, this troll is /sci/'s responsibility. You made him, you clean him up /sci/