system
Given the following post, respond as if you're commenting on Reddit:
human
[The Dark Knight] Why didn’t Batman and Gordon blame Dent’s murders on the Joker’s minions?

Would’ve been a lot cleaner and Batman needn’t have become a fugitive.
gpt
The purpose of Batman taking the fall for Dent's murders is twofold:

The first, obviously, is to clean Dent's image and make Harvey a role model and symbol for justice in Gotham.

The second purpose is to *remove* Batman as a symbol for justice in Gotham. Sounds crazy right? Well, hear me out.

As said by Gordon, Batman isn't the hero Gotham *needs* right now. Batman was a good symbol of justice, and he did combat crime rather effectively, but his methods were... Rather violent and less than legal. It inspired copycats (which almost got killed during their appearance, and then finally got offed by the Joker). This is what happens when Batman is alive and well, and operates normally. Imagine the amount of copy cats that would come if Batman sudden disappeared and was no longer around to fight crime, thinking they need to help uphold "justice".

Harvey Dent meanwhile, represents the "White Knight", a more "clean" version of justice, less violent, and most importantly: Legal.

By replacing Batman as the ideal symbol of justice in Gotham, it paves the way for more legal and stable methods of controlling crime: Including the "Harvey Dent act" we are presented with in the next movie. Instead of people wanting to become vigilantes like Batman, they will instead strive to become lawyers, attorneys, police officers etc.