/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

>>7
You impertinent little shit. Guess who made the browser you just posted with, are the maths software you do your 1+1 bullshit with? That's right, PROGRAMMERS. Guess what egghead, there's more to life than memorizing equations that OTHER people came up with, you low life amphibian shit.