This is a typical requirement that blows up on implementation.

How do you deal with retweets?

Example: >I tweet: I love christians @Pontifex

@Pontifex retweets.

Fix "typo": I hate christians @Pontifex

Refresh @Pontifex profile, screenshot ...

Do you notify retweeters that the post was edited and ask for acknowledgement? Do you nullify the retweet? Do you mark it as edited?