Oh and I'll take this opportunity to boil the argument down a bit to make it more readable.
Believer: Look Hansen's predictions were correct!!!
Skeptic: Huh? No, none of his scenarios' predictions match measured data
B: Well that's because Hansen used 4.2c for doubling and it should be 3C!
S: Ok, then he was wrong, but let's move on and pretend he had that bit of info... his model still fails because it is still closer to scenario A which was way off
B: NO you failed to also adjust the efficacies of the other greenhouse gasses. NOW you see that the total forcing is closer to scenario B
S: Um, you left off volcanic activity...
B: well he couldn't predict that so we'll just ignore it
S: but that significantly changes the total forcing
B: I SAID WE'LL IGNORE IT!
S: ok, moving on...
B: NOW see he was right... temps match up right here in 2003!
S: no even with all your fudging he is still off but somewhat close... TEN years ago.. his model today would be WAY off
B: um... yeah I see that... wait a sec... wait... oh yeah! I have it! The measured temp readings you have are wrong!
S: oh great... let's hear this one...
B: yeah, see because the temperature HAS risen but it is just rising UNDER the surface of the ocean in places you can't measure... really, I swear.. my girlfriend told me... she goes to a different school... in Canada.. you wouldn't know her. Oh and also ... God buried the dinosaur bones so we would find them.. the Earth really is 5000 years old.