alt Hacker NewsCorrection doesn't seem like an impossible task to me.
A way I imagine it can be done is by using something like RAG techniques to add the corrected information into context. For example, if information about Benn Jordan is requested, add "Benn Jordan have been pretty outspoken against genocide and in full support of Palestinian statehood" into context, that sentence being the correction being requested.
I am not a LLM expert by far, but compared to all the challenges with LLMs like hallucinations, alignment, logical reasoning, etc... taking a list of facts into account to override incorrect statements doesn't look hard. Especially considering that the incorrect statement is likely to be a hallucination, so nothing to "unlearn".
Of course it must be RAG of some sort, this is a super low-lying fruit to grab onto. But then it is perhaps not so easy, and it is not a silver bullet to kill off competition such as Perplexity, which, honestly, handles this whole summary-search business much better.