One side of the argument, a very strong argument it has to be said, suggests that Brendan Rodgers should simply have played for a 0-0 draw against the Blues, instead of naively going all out for the win when a point would have been enough.
Others, though, argue that Steven Gerrard would still have slipped - and Liverpool would still have conceded against Jose Mourinho's side.
But, regardless of what happened on that fateful day, the debate must be considered again when Chelsea visit Anfield this time around - for very different reasons. Rodgers' side now are incomparable to the one that challenged for the Premier League trophy with Luis Suarez leading that charge.
Against Real Madrid earlier this week, however, the Reds produced a very positive performance against all odds.
The Liverpoool boss played a heavily changed team and went for a tight, defensive game - something he hadn't even looked capable of doing until visiting the Bernabeu.
Every game, Rodgers' emphasis has been on all out attack. But tomorrow's clash, just like the Real Madrid game, calls for defensive solidity (partly because Liverpool simply can't attack in the same way anymore). Playing for the draw will be no bad thing and, if the Northern Irishman goes for an open, expansive approach, it will play right into Mourinho's hands.
Kolo Toure proved he can defend against the world's best in Spain, while Simon Mignolet also stepped up to the fore. Numerous other positives, meanwhile, suggest Liverpool's best approach right now is to keep things tight while things are yet to click in the final third.
Is it time to use those lessons against Chelsea?