The "you already lost to LSU" argument

This seems to be the ONE argument those against a rematch cling to for dear life. It's such a ridiculous argument too. LSU fans and other fans against an LSU/Alabama rematch are essentially arguing that because LSU is the likely opponent in the BCS title game that this fact more or less negates any argument that Alabama fans may bring up that their only blemish was the the consensus #1 team while other 1 loss contenders had MUCH worse losses. Think of how irrational and bizarre that argument is.

One would think the main focus of the BCS AT THIS POINT is to determine who #2 is. #1 (assuming LSU wins out) is a given. How do you determine who #2 is? Do you A)Look at each contender's body of work, who they beat, who they lost to, and look at how they stack up to the other contenders for #2 or do you B) Eliminate contenders not based on how they stack up with other contenders for #2 but what would be a "fair" match up for #1? I submit that A is obviously the logical way to pick LSU's opponent yet LSU fans and other anti rematch fans actually try to argue the absurd point B as the correct way to determine who #2 is. It makes no logical sense whatsoever.