The answer will not give his direct replacement. The answer will give a player regularly included in the same squad as him. Again, I reiterate my point about the subs bench. If it worked the way it did in football, with a very limited number, no chance to bring a subbed player back on and not being allowed to utilise your full bench, then yes, you would be correct.
However, that's not how Rugby League works, thankfully. If you start the game as one of the four on the bench, you're extremely likely to get just as much game time as the man who starts in your position on the pitch. That does not make you his replacement.

And for my extra point, I addressed that issue in my very first post on this thread:

I would agree, i thought he was excellent tonight. Great comeback game from him.

We are a better side with him in the team so yes we missed him and if LSoW can't see that an appointment at specsavers is in order.

Hansen's a class player!

Great to see him back!

Is that you Emma? Has the restraining order H put on you expired yet?

He came back into the side tonight and was superb. I thought it was one of his best performences of the year and he really added alot to the side. I also thought Tuson was very good tonight and that was pleasing. He's struggled over the past few weeks and I was a little suprised to see him given the nod ahead of Farrell but he justified that call by the end. He ran and tackled himself to death in the same sort of way he was doing for the vast majority of 2010.

Much better.